I remember the CSGO skin betting sites. You'd transfer skins to bot accounts to bet on streams of esports matches. The skins were valued at market price from the Steam marketplace. After the match, other bots would then transfer back to you a collection of skins equivalent in dollars to whatever the odds were. The system would give you whatever skins it could to fill the equivalent dollar amount so there would be a lot of common skins that you'd flip for pennies. Larger bets meant you got back some skins actually worth keeping. Obviously this marketplace only gives you Steam store credit but it wasn't that hard to find third party markets that would let you "gift" game codes you bought with Steam store credit or trade CSGO skins again.<p>It was immediately apparent the whole thing could be used to launder money easily across borders, you don't even need the third party market buyer to be in on the laundering. The products being sold were legit and had real value to everyday people unlike bitcoin or expensive art.