Amazon
Amazon is the richest channel for supplement monitoring data. MarginSonar captures buy-box ownership, Subscribe & Save pricing, lightning deals, coupon badges, list-price anchoring, and third-party seller counts — in addition to standard price and promo signals.
Signals monitored
Identifies who holds the buy box (Amazon vs third-party)
Subscription discount percentage and effective price
Number of alternative sellers on the listing
Detects "Limited time deal" and similar badges
Data fields captured
Monitoring cadence
Multiple daily captures. Capture timestamps are tracked per page so your team always knows how fresh the data is.
Sample evidence
Real signals MarginSonar has surfaced on Amazon:
- Detected a Subscribe & Save discount of 5% on a hero probiotic SKU, bringing the effective price below the DTC price.
- Identified a third-party reseller holding the buy box at a price 15% below the brand's own DTC storefront.
- Captured a "Limited time deal" badge with a 14% discount on a creatine product during a promotional window.
Known challenges
Buy-box ownership rotates frequently — sometimes multiple times per day — so point-in-time captures may not reflect the full picture. Subscribe & Save pricing is only visible in certain account states, and lightning deals have short windows that can be missed between capture cycles.
Monitor Amazon for your supplement brand
See how your products and competitors are positioned on Amazon — with pricing, promo, and stock intelligence updated daily.