Gmail blocks a ton of smaller email services for generating spam / scams / malicious activity, just because a protocol is open doesn’t mean it has to tolerate problematic content.
This is exactly my concern, I don’t want my online activity to become another revenue stream for meta. If they can put ads next to our posts then we’re back to working for free for the billionaires.
If you’re supporting the side indiscriminately starving millions, you need to take a very long look in the mirror. This fight is villains vs villains, and civilians are taking the brunt of the brutality from both sides.