As previously mentioned, starting today, all Sponsors profiles will have custom amounts enabled by default. This means if you have a GitHub Sponsors profile, people can sponsor you for a dollar amount they choose, rather than just the amounts you published. This will simplify setting up Sponsors profiles as well as make it easier for users to make sponsorships.
For maintainers who did not have custom amounts previously enabled, and therefore had no minimum, we set a minimum based on their lowest tier value. If you prefer to change your minimum custom amount, you can do so via the Sponsors dashboard. Learn more about managing sponsorship tiers.