Dang, I hope you got a lifetime pass.
I do! Not by my choice… I know this sounds very ungrateful but I preferred my monthly payment. Paying every month was motivating to get done asap. Lifetime…makes you lazy 
All purple level badges are people with lifetime subs. ^^
If you hover over a badge, it also has a pop-up that tells you if he user is on a free account (white/grey, like yourself), a paid year or monthly account (blue), or a lifetime sub (purple).
Oh, thanks. I didn’t know that.