Help yourself and maybe help the food bank as well.
Kellog’s cereal - buy five get 60 airmiles.
BUT on some of the selected packages there are free coupons for more cereal.
Cut out the coupon and go “buy” five more for free. Get 60 more airmiles.
Unfortunately the free coupons are for cereal that didn’t have coupons for more cereal so you can’t do this ad infinitum.
The packages I got had coupons for 750 ml of yogurt or some amount of bananas.
So for less than $20 you get 10 packages of cereal, 120 airmiles (worth in my estimation at least $30) and five coupons for free yogurt.
Then, give some number of the free boxes to the food bank. Each box you give is a box plus free yogurt. Everybody wins.
(I am at the stage of life where things like this excite me.)