I would consider donating, but I'd frankly prefer to donate to tax-exempt orgs. That way I can donate more with the same effective "cost" to myself. I get that it's not trivial to set one of these up (especially for someone who is already in a funding deficit), but I think it would make donations a more attractive option for people. Additionally, the email talks about funding in hours of development work, but doesn't…
Is there any sort of general purpose tax exempt org for funding free/open-source software development? Someone makes a tax-exempt donation to that org, earmarked for a particular project, the org forwards the donation to that project as a grant (minus a deduction for admin costs/etc). Then on-boarding a new project would mean just getting that project approved as a grant recipient with that org, which presumably would be a simpler process than setting up a tax-exempt org from scratch.