I haven't invested any of my own BTC yet. They give you 100 Gh/s for signing up and after two initial test withdrawals
(.001 BTC and 16k DOGE) I've been cycling any earnings back into additional Gh/s.
So is it a scam? Possible. Probably. I'll play with the Gh/s they give me and hope for the best. But I also am not promoting
them because if it is a scam, I don't want people investing on my recommendation.
I am also preventing myself from investing in cloud mining sites, I don't want to risk my coins just for scam. If ever I join it, only for free and try it without investing so whenever it turn to scam, no worries at all because I didn't waste my money on them.