Tips and support
People ask, and then the answer is a link to a platform that takes a cut and asks them to make an account. It can just be a button on the page they're already on.

A ceramic dish with coins on a counter
Set a suggested price or let the buyer decide what it's worth.
They pay with a card and it's done.
A flat monthly plan; the tip is yours, less card fees.
Tips arrive in your own Stripe account like any other payment.