At the Flamingo and Royal Palm the 15% is charged to cover Pool, Wifi and housekeeping. Something owners don't have to pay but RCI, II and renters do.
SO an exchange (RCI or II) person pays 15% of what? There is no charge for the room other than the TS tax of $50. Renters I understand.
They pay the mandatory 50 a week TS Tax and a daily mandatory resort fee and no 15% SC or 5% tax. Renters pay the 15% SC and 5% tax and no $50 TS Tax. Pretty sure renters also have the resort fee too but that might be covered in the 15% SC.