I was really really bored and did some maths. Lolking recorded approximately 16143889 champion picks last month, putting it at ~1,614,389 games played the last 30 or so days. Assuming their popularity meter thing works like I think it does.
Dotabuff has like 10,301,044 games played.
I mean, if anything this is more proof of lolking is shit at tracking stats but still I found it funny.