Are people still renting cloud computing Power to mine Bitcoin?
No, you can't mine Bitcoin with CPU or GPU.
As far as I know, Bitcoin can be mined using CPU and GPU but it is well known that it isn't profitable using those anymore since it cannot compete with the hashing power of ASIC.
Technically it's true. But since people mining with goal to earn profit, IMO it's not wrong to say it's "can't" rather than "unprofitable".
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as far as Here I see people who get big profits through cloud mining. maybe there is, but I don't know about this.
I guess the one who earn profit is either the owner or very early investor on fake cloud mining (which is actually ponzi scheme).