How does selling tokens that are abstract from the actual mining service any more efficient than mining contracts?
Because they are not.
They are used to built pods who will be receiving your miner. Or the miner you will rent the tokens to.
You can sell them after mining with your equipment for 2 years for example. How does that work with cloud mining actual contracts lol ?
You can even sale the miner equipment you own after some times... again, cloud mining ?
This is not cloud mining. But real mining. Tokens gives you right to use electricity at a very very low cost.