Hey, I'm new on 2+2. I play 30s Turbos on Stars currently
Anyways, I've heard about people not sending back money, so I wouln't advise you to do it in general. Even if you think that neither of you regs has an edge on each other, its good practise to play someone decent, not just fish.
I agreed to chop once, won and sent the money back immediately.
Anyways, I've heard about PS refunding some players like you and they send you just 1/2 of a BI. I'm not sure why but that's how they do it. You should be glad to get something back