I want to preface this by saying that I really don't know anything about Lemmy, but I can see where subscriptions are managed by the subscribers servers in a federated situation: the community's server might not even know who is subscribed to it since the subscribers server might be responsible for pulling data.
But any individual subscribers server would know about other users on that server that are subscribed to that community
While it's running, have you checked docker stats to see how much memory/cou the container is using? What's the host, what're it's total resources and what are you using to run the vm?
Paperless-ng (or ngx, but I don't run that flavor)
I'm not opposed to operators trying to make money, if some server brings some feature that I find valuable, I won't begrudge them trying to make money off it. I think the hopeful thing with federation is that when one feels that an individual server is being abusive or doesn't like their monetization approach or is unhappy for some other reason they have the choice to go elsewhere. Competition is good.
Others have said it already, but I love my Framework laptop. I have one of the first gen ones, running Ubunut, and I'm looking forward to upgrading it to the new AMD motherboard they're releasing later this year. The fact that they have upgrade paths for their laptops is amazing.
I use cloud flare DNS and it has support for dynamic IPs, my current setup is through a plug-in in my PFSense router