7-11 $1 off $5 min spending w Visa Paywave

A good way to buy those small grocery bundles, like a pair of marigold milk on the 2 for $5.95 promotion and then deduct $1 off (while still getting your cashback/miles). Alternatively it works for alcohol(of the beer/cider variety) in a close enough range to NTUC/cold storage. You can probably think of more creative grocery mechanisms.