The first little while I was playing $5, $10, $25, $50, and sometimes $100 double-up games (I only started playing this year).
There's a lot of luck on a night by night basis but not in the long run / not if you're using all of the data available to determine the optimum pts per line-up.
I'm about $1,600 up right now (I was hoping for a lot more tbh...).
By the way, never play the public head-to-head matches... 99% of those guys are absolute pros (they'll take your money). I recommend the league double-up games and I also play the big tournament games for fun.