Well, something simple turned out to warrant a bit more research than I anticipated:
- Patreon requires an account. That can fuck right off.
- Liberapay is for recurring support only. I only do one-time payments that I renew myself manually every year: I don't want any recurring payments going on my credit card. Ever.
- Ko-Fi takes a 5% cut. Meh...
I guess I'll do Ko-Fi...