Or alternatively, play the games but ignore all of the micro-transaction aspects.
^ I've got almost 4500 Dota 2 games (!) and I have still spent $0. In fact I've actually made USD$9.07 by playing Dota 2, selling stuff that has dropped on the market. (The only reason I haven't made more is because when I lived in the US, they had a limit of how many items you could sell before you had to do a tax declaration to Valve :)
Damn you Phooks, you got me excited there for a moment.