I got pretty bored today and saw the steamgraph for Dota 2 and decided to look at TF2

TF2 since steamgraph began March, 2011 I think?
http://steamgraph.net/index.php?action=graph&jstime=1&appid=440&from=1191214800000&to=1374642000000


TF2 since last July 24th
http://steamgraph.net/index.php?action=graph&jstime=1&appid=440&from=1343106000000&to=1374642000000

TF2 has grown in number of active users quite a bit, especially since F2P.

Regular Spikes of 22,000 Players before F2P
Regular Spikes of 65,000 Players in the Following Months of F2P
which trailed off to about 45,000 but steadily increased from their.

Currently Spiking around 75,000 on a regular Basis.

Large Updates Season/Really new content based ones get 100,000+ Players. i.e. Halloween, F2P, Winter Holidays, and MvM.

Wonder how much these stats will change now the people can't make 20 idle accounts.