So after reading several pages in this thread, I'm still uncertain whether BTC-Arbs is a legitimate business, or is a ponzi scheme which will rob me of my coins within a few months.
Is there any conclusive proof that there is some shady work happening behind all this? It appears everyone is able to generate interest and withdraw funds with no issues, and if they are making a cut out of all this, it's in their best interest to make their business model work.
It's mainly the anonymity of the site operators, the fact that their script is the same as a known prior scam "Poker By Proxy" site, though they explained that it's a commercially available script and they had no knowledge of the poker site. The two concepts are pretty far from each other expertise-wise though and the Poker site did a LOT more marketing, even going so far as to hire actors to portray the site operators in some promotional YouTube videos. Not the same M.O. here.
So far it's just skepticism about the concept I guess...there isn't any evidence that it's a scam. I have been at it for a month with no issues and pretty good returns.