While these two tours are new, extremely similar versions of them were "trialed" as DCL excursions when the ships were calling at Port Canaveral from New York and Galveston. A bus would bring the groups (20 people per 2 guides) from the port to MK for the Family tour , where the tour would begin. They did well, so they were developed further into the products you see today. I'm sure there are reviews of them online from DCL passengers. They were split into Families and Thrills back then, also.
Whether or not they are "money grabs," it was demonstrated by the ship excursions that people were willing to pay for the service. Those tours were watched very closely, and the tours announced this week would not be happening if those initial tests hadn't gone well.