Does anyone know how long it usually takes WidgetBucks to approve a second site to post ads on? Would posting ads on a domain other than the one already approved be frowned upon or bannable?
It usual takes about couple of days, 1-3 days. I think you should be fine for posting ads on non approved website, as long as it meets the terms.
Well, if it only takes them a few days to approve it, I'll just wait rather than risk getting the boot.
That's a good choice, because taking a risk and getting your account suspended its not worth it. But sometimes the review sites within 48 hours.