It's a scam! Here is my analysis as to why:
https://steemit.com/bitcoin/@haejin/are-mining-contracts-a-scam-madoff-would-be-proud
My analysis recently nailed the Bitcoin bottom and has made many very profitable calls. Please check out: https://steemit.com/@haejin
Yes GM has made a sick ammount when they staked the Bitcoin and got the free bitcoin cash. I havr faith they will pay but its when! 😤