https://en.liberapay.com/ won’t work for people using Patreon as it’s anonymous donation platform. From their site:
“Payments come with no strings attached. You don’t know exactly who is giving to you, and donations are capped at €100.00 per week per donor to dampen undue influence.”
The solution for Patreon is to re-aggregate the pledges and allow patrons to fund their account in advance and have that debited.