It's very suspicious. Bitcoin Arbitrage, Cloud Mining, and Crowdfunding are all different terms and they're not connected in any way. I wonder what OP really meant. Doesn't make sense to me
This is not Cloud Mining. It is a crowdfunding campaign where backers are rewarded with a set amount of Bitcoin at below market values, which creates an arbitrage opportunity. Arbitrage is the purchase and sale of an asset to profit from a difference in the price. So since the Bitcoin perk is set at a below market value, the backer can cash that Bitcoin in at a higher current market price.