I would agree with you. I dont see why people even sell out there equipment unless they dont have time or whatever. The only thing that makes sense is that they charge more or around what they are going to make. Renting is guaranteed BTC whole mining always doesnt. But why not just use the equipment instead of renting it. Who ever rents it isnt going to get anything back but pennies worth in my opinion.
I seen one cloud mining platform that looked awesome. Until you seen the price. I ran a calculator of the hash rate and such. You ended up paying more then you would have ever gotten back in return. Totally not worth it. It really isnt. unless you own the rig or servers.