It's an interesting change, which appears to me to be purely motivated by making more money. Nothing wrong with that, of course (and I'm sure bustabit and investing in the bankroll will remain profitable for years to come). However, 50% is squeezing investors a bit, and it hamstrings the potential significantly. bustabit has been my go-to recommendation for Bitcoin investing, but it appears I may have to reconsider. I'll be divesting my small stake in bustabit and deploying it back into flashflip, which keeps the commission model (thus giving investors a 25% greater expected profit on each coin wagered).

Nevertheless, good luck with everything.