Lol, getting your ass kicked on a regular basis by a 1/5th cost or worse yet, now F2P game like TF2 has got to be embarrassing.
I'm not really grasping your logic here. F2P games essentially have no barrier to entry. As such, they tend to have more players simply by virtue of being free. This is why LoL has more players than WoW and why previously subscription-based MMOs saw significant player boosts after going F2P.
TF2 was not initially F2P but it still had a sizable audience. Going F2P only increased that audience.