[pzhon]

For bankroll purposes, you can just add the bonuses to your win rate. The 300 BB suggestion that some people worship assumes a particular win rate (and variance). If your win rate is lower, you need a larger bankroll. If your win rate is higher, you don't need 300 BB for the same level of security. Doubling your win rate cuts the bankroll requirement in half, and vice versa.

At the 3 Cryptologic sites paying 5 GBP/table hour (about $9.50), you may get a boost of 6+ BB/100 at $1-$2, greatly reducing the bankroll necessary to play $1-$2. I believe half-decent players only need a bankroll of about $150 to play for these bonuses.