https://en.wikipedia.org/wiki/Flattr figured out some parts of this. Notably, you picked your own total monthly donation, and then clicked a button on participating sites to allocate a fraction of your total to them. AFAICT it worked as advertised, but raised new issues with donation behavior. E.g. I obviously like curl every month, so should I click its button monthly? Twice monthly? If I am a developer of some other useful OSS software, should I click curl's button and the curl devs click my button? Does the money just slosh around between merchant-customers? Is that good?
It seems like something happened around 2026-05-01 (https://bigasterisk.com/post/delivered-email-rate-2026.png) where it became easier for spammers to make technically legitimately deliverable mails. Or my postfix is setup wrong.
Note "spf=pass" and "dkim=pass" in these headers: