[lern_too_spel]

If they wanted to do this, they would give you cash back, which is accepted anywhere. If merchants want to incentivize you to use your cash back "points" at their store, they would give you a discount on the card.

Guess what? This already happens! And without the waste of a decentralized ledger.

[tornato7]

Cash back is fundamentally different because the store is setting their own exchange rate. Giving away ‘points’ is cheaper than giving back an equal amount of cash because the points can only be spent at the store. By minting points as tokens, the market can then choose an exchange rate through supply and demand of various rewards points.