Yeah. AFAIK, they took 2.5% for every payment from their main wallet.
For instance, if they make a payment of 1 BTC to an "investor", they will send 0.025 BTC to their wallet where they collect the fees.
You can find both of their wallet in my post here.

PS: I observe their wallet activity all the time, lol. (except when I am sleeping)

Edit:
It seems their fee is ranging between 2.5% to 10%+.
I'm not sure, but I think bx2.club should be able to elaborate about this better than me.