And yet?
Mastodon is full of actual conversations between people. Someone says something. Someone else replies and an actual conversation happens where people respond to each other.
Lemmy? It almost always devolves into people trying to one up each other and aggressively talk at each other. It is like we speed ran reddit and went from “How dare you have a different opinion” to “I am going to cherry pick a sentence and build a whole fucking straw city from that”.
Make sure to actually understand how those “non-profit” websites and services are functioning.
It costs money to power servers and to maintain them. Most of the fediverse instances like to claim they are run on donations and so forth. But… think about how angry people get at the idea of tipping for ANYTHING and then wonder how many of those are throwing significant cash at your favorite lemmy or mastodon instance per month.
Everyone is always shocked when they find out how social media or a “free” vpn or whatever is funded and where there information is going. But hey, I am sure it will be completely different this time.