Though I like the idea (and possibly for the short term there is money in investing in Bitbays), I would imagine that once the more traditional arbitrage traders come in (already present in equity and FX markets) that have faster machines and connections/APIs, Bitbays will lose vs the experience and superior technology the 'pro' players have. As a former arbitrage trader I do know what they are up against and I doubt a start up company will be able to beat them. In any case all the best though and good luck.