[PNXRMX]

As far as I know, webdollar is just the cashier service that all boss network sites use. Poker heaven uses the same service. Seems pretty secure. You get a code mailed to you via regular post that you need to be able to cash out, which I haven't seen in any other cashier.
And yes, some boss network sites offer 30% rakeback + bonus, so you get 50% rakeback until you've finished the bonus.