Thanks for your list but that's kinda mainstream...
There is actually another way that some as$holes are using to make money on this forum and other places on internet.
And that's by being a SCAMMER!
Scam in this forum starts from Bounty campaigns that waste time (and sometimes money) of people (desperate people sometimes)
or directly selling something that does not exist or is not for them!

So be careful all over this forum and doubt everything that does not make sense. peace.
_{note: I'm a full member from 2015 on my main account. don't judge me by this}