Where aggregate leverage helps and where fees claw it back
Aggregate pricing can genuinely lower medication cost when Refill's network volume earns better 503A rates than a clinic negotiating alone. The meet-or-beat guarantee is Refill's public commitment that competing quotes can be matched on medication pricing. The clawback is the software fee layer: as order volume grows, total software fee dollars grow with it because the fee is percentage-based on transactions within published tiers. A clinic ordering hundreds of GLP-1 refills monthly pays more in software fees than a low-volume account on the same tier, even if the per-vial medication rate is attractive.
The harder issue with any unpublished volume model is verification. Without public per-vial tiers, you cannot independently check whether the rate you receive reflects the volume you bring. Get the medication rate curve and software fee tier in writing for your top SKUs, and model total cost at your actual monthly order count, not a headline savings claim.