An approximate 4388 BTC bankroll x c.$35,000 each is way above $153 million invested thus far.
Is that bankroll the total of both bustabit and bustadice? Or is it only for the bustabit? Because for me, that's a lot of money for one site to have especially with only few games. Pretty neat that they are this successful, I hope that they open their signature campaigns again in the forum.
That number appears to be the total for both sites.
Bustabit current bankroll:
BTC 2,227.93821432Bustadice current bankroll:
BTC 2,188.74253414