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Trust Badges & Reputation System

TL;DR / Quick Answer: BDX.market uses an automated, database-verified Trust Badge and Reputation System based on real order completions, rating averages, dispute rates, and KYC checks rather than vanity metrics. Sellers earn Verified Seller, Top Rated Merchant, or Instant Delivery badges through proven performance, with automated daily demotion if metrics drop below platform standards.

In a peer-to-peer digital marketplace, establishing seller reputation and buyer trust is critical to driving conversion and maintaining marketplace health. BDX.market implements a transparent, multi-tier Trust Badge & Reputation System. Designed specifically for the Bangladesh gaming and digital commerce landscape, BDX replaces fake reviews and vanity metrics with automated, database-verified performance badges.

This document details the badge tiers, qualification algorithms, rating calculations, seller levels, and policy enforcement rules governing trust badges on BDX.market.

Trust Architecture Overview​

Reputation on BDX is calculated strictly from verified order transactions, successful completions, dispute rates, response speed, and completed identity checks. Sellers cannot purchase badges or manipulate feedback.

┌─────────────────────────────────────────────────────────┐
│ Tier 0: Normal Seller                                   │
│ - Assigned automatically upon seller profile creation   │
│ - Basic store listing access                            │
└────────────────────────────┬────────────────────────────┘
                             │
                             ▼ (Complete Tier 1 KYC + 10 Orders)
┌─────────────────────────────────────────────────────────┐
│ Tier 1: Verified Seller Badge                           │
│ - Verified Identity (NID / Smart Card Check)            │
│ - Blue Verification Checkmark on listings               │
│ - Higher buyer conversion & trust ranking              │
└────────────────────────────┬────────────────────────────┘
                             │
                             ▼ (100+ Orders, >98% Rating, <1% Dispute)
┌─────────────────────────────────────────────────────────┐
│ Tier 2: Top Rated Merchant Badge                        │
│ - Elite Gold Badge on Storefront & Listings             │
│ - Priority Placement in Game Hubs & Search Results      │
│ - Fast-track Twice-Weekly Payout Approvals              │
└─────────────────────────────────────────────────────────┘

Badge Categories & Verification Criteria​

BDX awards specialized badges based on verified milestone performance. Badges appear dynamically on seller storefronts, product hub offer lists, and item detail pages.

1. Verified Seller Badge (badge_verified)​

  • Visual Marker: Blue Shield Checkmark icon beside store title.
  • Qualification Criteria:
    • Completed Tier 1 or Tier 2 KYC Identity Verification (verified NID/Passport).
    • Minimum of 10 successfully completed orders on BDX.
    • Zero active account restrictions or unaddressed fraud flags.
  • Platform Benefit: Increases buyer trust, grants access to listing high-value items (up to 25,000 BDT).

2. Top Rated Merchant Badge (badge_top_rated)​

  • Visual Marker: Gold Star Crown icon on listing cards and store avatar.
  • Qualification Criteria:
    • Minimum of 100 verified completed orders.
    • Rating average $\ge 4.8 / 5.0$ over the last 90 days.
    • Order completion rate $\ge 98%$ (less than 2% cancellation/refund rate).
    • Average initial chat response time $< 15$ minutes.
  • Platform Benefit: Top-tier search algorithm priority, featured placement on Category Homepages.

3. Instant Delivery Badge (badge_instant_delivery)​

  • Visual Marker: Lightning Bolt icon.
  • Qualification Criteria:
    • Seller utilizes automated delivery vaults (BdxOffer auto-fulfillment credentials).
    • Over 95% of digital keys/codes delivered automatically within 60 seconds of payment verification.
  • Platform Benefit: Attracts buyers seeking immediate digital fulfillment (e.g., Free Fire Diamonds, Steam Keys).

Rating & Feedback Calculation Metrics​

Buyer feedback on BDX is tied exclusively to confirmed paid orders (BdxOrder). Non-purchasers cannot leave ratings or reviews.

Rating Calculation Formula​

The overall seller score (R_seller) displayed on product hubs is calculated using a Bayesian weighted moving average over historical order ratings:

  • v: Number of total rated orders for the seller.
  • R: Average rating score given by buyers (1.0 to 5.0).
  • m: Minimum rating threshold count (m = 5).
  • C: Mean rating score across the entire marketplace platform (C = 4.70).

Formula: R_seller = ((v * R) + (m * C)) / (v + m)

This formula prevents new sellers with a single 5-star review from outranking established sellers with hundreds of verified high ratings.

Verified Review Submission Rules​

  1. Eligible Review Window: Buyers can submit a rating (1 to 5 stars) and written review within 14 days of order completion or auto-completion.
  2. Review Edit Period: Reviews can be updated by the buyer once within 7 days of initial post. Sellers cannot edit or delete buyer reviews.
  3. Seller Response Right: Sellers have the right to post a single public reply to any review received on their storefront.

Automated Reputation Maintenance & Badge Demotion​

Reputation is dynamic. If seller performance degrades, the system automatically adjusts badge eligibility to protect buyers.

[ Scheduled Daily Reputation Job (03:00 UTC) ]
                    │
                    ▼
     ┌────────────────────────────┐
     │ Fetch 90-Day Metrics for   │
     │ all Active Sellers         │
     └──────────────┬─────────────┘
                    │
                    ▼
     ┌────────────────────────────┐
     │ Evaluate Rating Avg,       │
     │ Dispute % & Response Time  │
     └──────────────┬─────────────┘
                    │
         ┌──────────┴──────────┐
         ▼                     ▼
  [ Metrics Met ]     [ Metrics Failed ]
         │                     │
         ▼                     ▼
┌──────────────────┐  ┌──────────────────┐
│ Maintain / Grant │  │ Strip Badge &    │
│ Trust Badges     │  │ Notify Seller    │
└──────────────────┘  └──────────────────┘

Automated Demotion Triggers​

  • Dispute Surge: If a seller’s dispute rate exceeds 3.0% of total orders over any rolling 30-day period, the Top Rated Merchant badge is automatically revoked.
  • Rating Drop: If the rolling 90-day rating average drops below 4.60, the seller loses Top Rated status and receives a system advisory notice.
  • Unresponsive Seller Flag: Failing to respond to 3 consecutive buyer dispute cases within the mandatory 24-hour deadline results in immediate removal of all trust badges and temporary suspension of new listing privileges.

Anti-Gaming & Review Manipulation Safeguards​

BDX actively monitors for rating manipulation, fake review rings, and feedback extortion.

  • Self-Dealing Block: Sellers are strictly prohibited from purchasing their own listings using alternative buyer accounts to inflate review counts. The platform checks buyer-seller IP overlaps, device fingerprints, and shared payment methods. Self-dealing leads to permanent seller bans.
  • Review Extortion Safeguard: Sellers cannot withhold digital keys or delivery service conditioned on receiving a 5-star review. Buyers can report feedback extortion directly to dispute moderators, resulting in immediate seller penalties.
  • Removal of Fraudulent Reviews: If an order is canceled or refunded due to seller fault or fraudulent listing details, any negative review associated with that transaction is preserved, whereas fraudulent positive reviews from banned accounts are purged.
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