I've seen this posted before, but how does that make their stats look good? Oh you've got X million users! And how much money did you make? Oh. So how many of your users have ever paid you any money? Oh.

I assume their logic is to give you free games so you get into the habit of looking at their storefront and going to their launcher to play your games in the hope that you'll start buying your games from there instead. I can't see how claiming the freebies but never giving them money helps them.