1 BTC = 5.5 MH/s

IMHO a probably date for first dividends, in case of late delivery, should be mid of July.
Dividends will be sent weekly.
About ROI, according to the current level, you will earn first profits after 2 month and 1 week. Anyway is a possibility that litecoin's value will raise against bitcoin because a lot of people are buying equipment for litecoin's mining so a lot of moneys now are invested in litecoin's mining and soon many litecoins will be sold and bought.

I'm working for a diagram which will explain what's the ROI of this GB. I'm also working to get an ESCROW as soon as possible. I will update soon in the topic.