More businesses are asking customers to tip — and shoppers are getting sick of it

• American consumers are experiencing "tipping fatigue" amid high inflation, according to CNN. 
• Many have taken a stand against the pressure to tip everywhere, saying the US has a "tipping culture."
• But others say tipping is necessary to support workers in the service industry. 

As electronic cash registers have become ubiquitous at businesses from coffee shops to convenience stores, so too has the question: "Add a tip?"