Question about cloud mining

I know many of you oppose it with a logical explanation; why don't they mine all the crypto themselves and make money?

Maybe that is the reason you see "Out of Stock" on many of these cloud mining services, for example, at genesis-mining.com and hashflare.io you can't even order right now because they are all sold out.

Are they mining themselves or people actually have bought all the packages?

by selling packages they can get a fixed amount of money which is profitable, this helps when uncertainity in prices of crypto comes they wont loose anything.
Now the crypto prices are high, maybe they are mining themselves , that's why they have put Out of Stock

Yes, I personally think they are mining themselves.