Fee : to keep the site running.( owner can also join the cycle so he/she will earn some profit)
I would think the smarter way to run the site is the site owner takes a flat fee off the top of every transaction. If not what's the point of creating the site?
5% maybe?? 62500 sats every exit transaction if im not mistaken..
If the cycle will not break i guess he/she can have atleast 0.1/perday or even higher if he/she him self will join the cycle..