I wouldn't. It's a lot of work and you basically have to be glued to your computer 24/7. At 0% escrow, nobody tips. At 1%+ escrow, nobody wants to use you for escrow anymore.
I do it for no fee because I have an absolute loathing of scammers, yes it involves a bit of time, but at least members don't get scammed
I'd like to think karma will shine on me