Free: Contests & Raffles.
100% against this, unless the customer placed heavy demands for turnaround on the taxi, and the taxi met those expectations. Or some similar extraordinary effort above and beyond a normal taxidermy transaction. Tipping culture is completely out of control, IMHO. Offer your services for a price, accept payment of that price, and don't expect a customer to make up for your lack of willingness to pay a reasonable wage to your employees on your behalf. We're stuck with food service tipping, but I resist it at every other opportunity. If anything other than a sit-down restaurant expects me to tip as a form of payment, they'll never see me again. That said, I do tip often, and generously, when the service is warranted. , and off my soapbox now.