All cloud mining services have recently collapsed. I think that the only solution to this problem is related with green crypto mining. It will be able to solve the diminishing returns issue related to more costs and less rewards.
Theres also a sudden huge increase in hashrate again and there are some reports that total mining power is touching 60 Ehash/s. Smaller miners are being killed lol.
Having that said, the solution to the problem is to buy BTC, not mining contracts. But if theres a small miner who wants to explore other possibilities then give Proof of Capacity a try.