This is the beauty of +UP rewards. You can use them on things you really need!! Especially when they're about to expire on you!
Simplify toilet paper (12 rolls)
RP $7.99. Minus 20% discount. FP - $6.39
RP $0.85. SP $0.50. Minus $0.50 coupon. FP - Free
Used $6.00 in +UP rewards.
Final shopping total - $9.37
OOP - $0.92
Saved - $8.45 (about 90%)