Is there any point to leaving money on Starluck and Planetluck?

[KSOT]

Or any site with an initial deposit bonus but no reloads, for that matter?

I try to leave at least $100 on every poker site I visit, just in case of a bonus or promotional event and to appear less like a whore. But is there any reason not to cash out everything I have after clearing the bonuses at various online casinos? Should I care if they think I'm a whore?