This site is a HYIP, run by a known repeat admin, nothing more. Don't waste your time discussing the possible legitimacy of the program. The admin is simply looking to take advantage of a new HYIP community in the bitcoin world which has already been done successfully by some scammy admin types like the former Leancy.com

Btc-arbs is nothing but the same, play it as an HYIP and get your money out while you can as its highly unlikely to become one of the better HYIP's.