I think it would be interesting talk.
I can't speak for the illegal options, but over on our own website we provide a decent LEGAL way for members to earn some extra bitcoin the fly.
GPT earning can be a pretty decent method for those who have the free time to spend filling out offers and surveys.
We are a GPT earning site (Get Paid To) and we have different offer walls and surveys that people can do.
Bitcoin is our most popular cashing out method for our members.
I know there are probably other GPT earning sites around the interwebs that will offer it's users bitcoin rewards just like we do.
Just find the site you like earning on the best and try it out if you haven't yet!