Have you heard of Proof-of-Stake mining?
It's one when you don't need to buy mining hardware.
Cryptonex site says you only need to transfer it to a wallet for Windows/Linux/MacOS and to keep online as far as possible.
I did that and now I get some steady income. It's hard to tell how that is all calculated, all I know is that I get 12% income per annum + some bonus reward (commissions from the transactions).