it's time based once you get past those easy quest. it'll happen, i too thought I'd never be high enough level but here I am a year later and I'm around rank 24-ish.
Dude! Just reading all the news articles have gotten me to lvl24! And that's with no FB and TT reposts(coz I've deleted my profiles years ago).
I don't think Jetah means the level. I think it's about his rank in the leaderboard (which is 15 at the time i write this).