This is the killer for us and, I'm guessing, many other marketplaces without a Lyft-sized (20%) rake.
Our current solution for marketplace payouts charges one quarter per payout. The funds are direct deposited in the user's account the next business day. Maybe we have a sweet deal, but to go from this to 1.5%, in addition to Stripe's other (higher than average) fees, is hard to justify. (Which is unfortunate, we'd love to use their great libraries!)