Only one issue

Would have given five stars, but I dont understand why there is not an option to continue collecting rather than automatically making me use it. I miss a lot of scans because I dont want to use up my free one. If I have money I prefer to pay and keep collecting. When I am low on money I want to use my free ones. Why cant I choose for myself?

Jrodd76 about 7-Eleven: Rewards & Shopping, v2.2.1