In 2025, tipping seems more ubiquitous — and contentious— than ever. Rather than an unimposing jar of singles with a punny label sitting on a counter, mobile payment services like Toast and Square bring the tipping options front and center. Though tapping a screen does make adding an extra dollar to your coffee purchase easier, the suggestion to add at least 25 percent to almost any transaction has led some Americans to believe that tipping has spiraled out of control. Not to mention that...