Boost stopped working a couple days ago so I'm now fully on Lemmy. Can somebody help me understand how this works?
So the subreddit made a .chat instance (which my boost for Lemmy app does not open in app), and these are the two mirrors for that one instance? But I feel my assumption is off because they have different posts.
Lemmy runs on a bunch of separate servers (instances) that share information with each other. 50501.chat is such an instance.
Any community - basically a subreddit - is hosted on one such instance
Your server, lemmy.zip, can pull information from that instance when you go to their community.
On your end, unless their instance is banned by your instance, all this means is that their community has a longer name. Instead of /r/50501 or /c/50501 or whatever, it's !mirror@50501.chat so that your instance can tell where to take you when you want to go there.