Questions on: cloud-mining

I know I was! I am up for quite a challenge - to try and sum up the basics of this intriguing industry. I first heard of bitcoin around 2012, but I didn’t pay much attention – it seemed pretty surreal and something for the boys to play with. Then in
@Etherion fairly sure MRR pays the miner when a job is complete, not at the start. But, the payment is "locked-in" at a certain rate, so the miner knows (because they set the amount) how much BTC they are going to receive I think the reasons to rent