Cancel fee trick

When they’re late I leave them. Sometimes I tell them why. They get pissed. They get a fee usually. Sometimes they make a report to Uber (yelled or cursed). I found I could uncheck the “charge cancelation fee” and not piss them off further. Then a day or so later initiate fare review. Uber asks again if I want to charge the rider, I click yes. Rider has discounted late fee days after the event (masking it), and Uber pays me $5.40 rather than $3.86. Win win. Uber loses so I better not do this often.