As a business owner that has used several different POS systems, I can tell you that they are choosing to have you see the tip prompt. I have never seen a system that didn't have tipping as an option that can be turned on or off. However, it is usually set to on as default.
Is this an error of some kind, or is this post actually that old? I'm using Liftoff so I'm not sure how to check for an actual post date.