"Devs don't see a penny of it anyways" Well that's because they've already made the money from it. The number of fraudulent keys on gray market / third party sites is very low. G2A is not like kinguin for an example where you can just add a key without any verification process. G2A needs proof of purchase before you can list your key. But hey, if you feel the need to buy from a third party site, do it from greenmangaming. They are pretty much legit and offer great prices.