Interesting theory. But ALL SERVICES can do like that,
No. Legitimate services can (and do) prove their hashrate
before they take orders. Moreover, especially those that trade contracts on exchanges allow you to compare sold vs (provably) deployed hashrate. So they
cant do this.
so in this way all services from your review are suspicious.
Its a good MO in the bitcoin world to assume
every service to be a scam until reasonably proven otherwise. Quite a few companies have passed that hurdle with no problems, as no legitimate company should in a world thats ruled by a public blockchain. Hashprofit most certainly has not.