Each merchant is different and the cash back percentage you earn will be shown next to the offer.
You can check the current cash back rates for a specific merchant by viewing the live offers in the app. Just navigate to the "Pay" tab in the app, and the cash back rate will be displayed next to each retailer.
In the example below, you can see that Uber Eats for instance, offers up to 3% cash back through Fluz.
