Signal 1: the rate gap on identical descriptions
If two panels list the same service description ('Instagram followers — HQ — drip — 30D refill') and the prices differ by 5×, the cheaper one is closer to the API rate. Not always better quality, but closer to the source.
Signal 2: same service ID, same naming convention
Many panels copy-paste their service catalog verbatim from one of three parents. If you see services literally named 'PHC v3 — 30D refill' across six panels, you're looking at the same upstream at six different markups.
Signal 3: the support delta
A 4× markup is fair if you get 24/7 support, refund processing in under 12 hours, and a real human on the other end of tickets. The same markup with auto-replies is just rent.