Is RCI a timeshare?

Excuse me, could you please clarify for me if RCI is indeed considered a timeshare program? I've heard differing opinions on this matter, and I'm interested in understanding the exact nature of RCI's offerings. Specifically, I'm wondering if it operates under a similar model where individuals purchase the right to use a property for a specific period of time each year, similar to traditional timeshare arrangements. I'd appreciate your insights on this matter.