I can't swear to it, but I think that the Activities are considered extras, because they're included in some of the packages and those packages look pricey-pricey beyond the price of the accomodations.

I've mostly stayed in middlingly-nice anonymous hotels or condos--never anything startlingly fine, though. One day I'd like to stay someplace nice, but that day isn't coming anytime soon, so for now I just have to resign myself to budget living and skip the luxury hols.