How are these keys obtained?
and how do we know they wont get removed later on?

All in the post, nerd. :^)
But for you non-readers, over the last year I have been gathering a huge inventory through betting but I'm cashing out for good now. You can check out my rep thread on csgorep (linked in the post) which is what everyone on steam uses that trades for real life money! It's the official rep counter of /r/globaloffensivetrade!
