Thanks!

Arbiters set their own fees for their services. either flat or percentage. That's for providing the escrow and the expertise.

maybe one day I could convince you to build your freelancing app on top of it... if your platform provides enough value-add over the base protocol you could absolutely charge platform fees. like perhaps you run a Cashu mint and integrate it deeply into the flow and charge a mint fee + whatever other fees you might be able to justify, like excellent search and categorization of posts or maybe limiting signups to an exclusive high-value group who people would pay more to access.