{
It looks like bunch of hackers (who don't have anythng do with CRM industry) stole open source code and make a living out of it.
}

Oh, you mean like Microsoft's "stealing" BSD's IP stack?
You mean like Microsoft's "stealing" BASH for the upcoming Monad shell?

How can one "steal" open source while at the same time conforming to the license to the fullest extent possible?

Here's a hint: you can't.

Excuse me while I go "steal" Linux. ;)