I discovered this by accident. It may not work 100% of the time.
If you create a patreon account using a simplelogin alias, patreon will automatically flag it as suspicious after a few minutes and delete the account.
This means you can make an account. Purchase whatever you wanted and wait. The account will be deleted as suspicious and the money is automatically refunded.
It was for me, I got a notice of a refund just a few hours after the account closer email.
Again I just discovered this and don’t want to come off like it’s a for sure thing.
In terms of payments methods, patreon seems to accept virtual cards, which makes it easy to avoid using the same payment method or tying any part of your identity to the transaction.