The creators of cloud mining websites know that mining is a very difficult thing these days, they also know that many individuals are eager to mine but do not want to take the trouble of setting up the mining rig themselves. So they create these services, which then become a big disappointment for most investors.
Unless you live in a country like China, I think the only safe form of mining is solar mining, but there are some problems, especially in the early stages, such as initial investing and technical issues.
I'd say the creators did the math and knew this will end up being unprofitable to investors, but they did it anyway. They did what every car seller does, showed their shit on display and hoped it will lure someone with a thick wallet and little knowledge, who won't see it for what it really is: a junk, a waste of money.