this post was submitted on 12 Jun 2023
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So, mostly correct. Lemme clarify:
If you do a URL search in the communities page (with all settings set to "All", even "Communities"), your instance will pull in a few of the latest posts and comments. Not anything too heavy, just enough to give you an idea of what's going on.
The moment a single user on your instance subscribes, your instance will start pulling in everything from that community. If every instance pulled in every community from every other instance, the network would be very vulnerable to a botspam instance that goes up would crash everything. Much better for an instance to only pull in communities that people are interested in.
can the instance owner limit the rate of amount pulled? Say, if a malicious user joins a small server, and then subs every known nsfw instances' communities what then? Like is lemmy by default a whitelist approach or blacklist? (or maybe somewhere in the middle?)
An instance owner decides. You can either make it whitelist or blacklist, your choice.
ahh, thanks, good to know. :)