Lack of opt-in into those will have me keep marking those as spam. Just like those US political newsletters that also don’t feel like they need to verify mails.
US political emails are even more annoying when you aren’t American. I flag all that stuff as spam without hesitation. If you do that, I hope your entire domain ends up flagged as spam.
I had the idea to do a 1 dollar donation and then see the campaign getting flagged for illegal campaign contributions, but that is probably illegal for me as well.