And this is the innocuous form of it. Places who don’t serve children often are generally happy to make their profits off of adults and worry less about income from the odd child (especially Starbucks).

If you want to see real tiered pricing, look at all the fast food apps. The purpose of those is to extract as much money from you as possible. Those who don’t want to deal with them pay double, and they don’t lose much business from those who refuse because they’re often willing to use the apps.