For cloud Mining certainly must have sufficient knowledge in the field of crypto, and also need to have adequate Hardware, its mean there must be capital.
Actually there is currently Devloper who has made special hardware to mine Cryptocurrency, and some are rent it out.
if the signature campaign, do not need capital, just join in bounty, follow the rules and do the task then we will be able to pay, although not as much as cloud mining and sometimes bounty can be scam. but I prefer the signature campaign.
I do not how you compare these and make post for it mate. Cloud mining is a scam attempt so far and mostly they scam the investors and lock their mining contract account with in a month of time.
Please do think also signature campaign with the cloud mining. Here many legit managers are available on this forum. They perfectly pays to their participants without any trouble.