Patreon
Patreon provides a platform for receiving recurring donations, optionally in exchange for listed perks.
Most open source developers who receive significant donations via Patreon offer advertising in the form of listings in sponsor-list files, websites, and documentation. See Evan You, Sindre Sorhus, and Henry Zhu. Some developers offer other perks, like early access to security advisories. See Eran Hammer.