I invested in Gainbitcoin and now receiving payouts.
Are you here just to promote this scam 
They even don't have any contact number and their location is not a real one.
To mine bitcoin they need mining farms not a datacenter like they have in this page https://gainbitcoin.com/data-centers.php
This is quite a red flag, without any contact number . I would avoid investing in this cloudmining because it is obvious. It is impossible to sell hashes without the source of that hash, and this shows that there is a chance that this company is just running a ponzi scheme. Possibly, payouts coming from the new investors that buy hashes.