Well, with InterPoker, if you bust out, then you can't clear the bonus playing Poker. However, you can log onto InterCasino and play the bonus money to clear the bonus. So for some players it may be a great idea.
It's something to consider separately to playing poker. It's possible to earn many thousands as a break-even player by playing through the bonuses, but in some cases it (or for some people) it may be faster and safer to accrue the bonuses by playing Blackjack
or Video Poker or the like instead, and it allows you to clear bonuses at some of the various casino sites which don't run poker games
Playing poker just to receive the bonuses often isn't worth the time invested as an hourly rate. However, it can be very useful as a means of boosting your bankroll more quickly than you would be able to otherwise. The reason for playing bingo or video poker or the like instead of poker is that you can potentially clear the bonuses much faster than on the low-limits poker games.