I’m definitely not disagreeing with you, but Lemmy has grown so large since the original “tankies” started Lemmy.ml that I don’t think it is really an issue for the larger community. I’ve only been here for a month or so but I have not seen many (if any) communistic related posts on the feeds, and if they are trying to spread their leftist messages they are not doing a very good job of it.
I have found Lemmy.world to be the most active platform, so I wanted to help out with server costs, thus the $2 per month. I have also donated to Ernest at Kbin and the Beehaw folks as well. I’m not going back to Reddit, so I want these communities to thrive and feel I need to pitch in the cost of a Latte every month to help out. Having said that, if I ever get the feeling that I am donating to some authoritarian cause I will stop donating immediately.
Regarding the donation, I signed up at Patreon which is referred by Ruud who I believe is the admin for all the .world Lemmy and Mastodon instances. I just saw where they actually prefer donations via OpenCollective, so I will likely change mine to that at some point.