The closest you get are F2P games like LoL which are not nearly as bad as this
Just to put this in perspective, LoL has more (by 400,000 users) concurrent players than the entire Steam platform.[1][2] I would also put forth the argument that you do gain an advantage by paying for stuff like new heroes which are almost always OP. I think the only element of PC gaming that is keeping more major studios out of the F2P models are dedicated server and p2p gaming where it doesn't make sense and is probably hard to accomplish in any meaningful way.
[1] http://en.wikipedia.org/wiki/League_of_Legends (para. 1)
[2] http://en.wikipedia.org/wiki/Steam_(software) (para. 3)