The first summer I worked at the hotel I work at, we didn't accept Priceline accounts. This sort of kept our clientele pretty , which resulted in better tips and more things for me to do, as they actually wanted help with their bags.
The past 3 summers, we've accepted Priceline accounts, meaning that cheap people come through. There people either A) don't tip well or at all or B) take the carts and do everything themselves because they don't want to tip. Priceline has severely impended my earning potential