Loyalty Program: Halal or Haram?

Salam! Today, I came across a question on ask.ghamdi.org forum. I'm curious to know the answer. The question is: The city in which I’m currently living in has loyalty program where if I buy a member card (with money), I receive a fixed percentage (10%) of amount I spent on buying the member card, each month. The fixed percentage is in the form of points that I can spend only on specific vendors. When I want to cancel the membership, The program deducts the same percentage (10%) of amount and returned the remaining amount. For example: I bought the membership with 100$. Now each month I receive 10% of 100$ i.e. 10 points (1 point = 1 $) When I want to cancel, the program deducts 10% of 100$ and give me 90$ My question is about the 10% I’m receiving each month: Is it SOOD? Original source: https://ask.ghamidi.org/forums/discussion/83015/