No deposit freerolls are the best kind and completely possible if you are a good player. I have bankrolls on BCP ($14), Bovada ($7), and Lock ($2200). I can't seem to hold a BR on Carbon since I have a variance rate of -4.23 (meaning I lose 4.23 times more often than I should.) which is kind of crazy since my population tested is nearing 11k hands. I play both Poker Owned and Cardschat freerolls on a regular basis and play them regardless of my bankroll because even if you have thousands, a free bankroll booster is always nice. So just continue to improve your play and you shouldn't have a problem building a roll.