This is what i have noticed as well. Apparently there are some that are legit and that have been around for years and years, however personally without actually having the equipment i doubt that i would trust any mining facility as the rewards can also be easily manipulated, even for a legit mining site.Cloud mining sites ate simply scam. They have dubious purpose we they're on operation. They aren't mining any legit Bitcoin, they just want to run away with our funds.