So my understanding is Reddit, or specifically u/spez, tried to claim that the Apollo developer was blackmailing them over the entire API pricing debacle. The Apollo developer posted the audio and transcript of the call with Reddit showing they were lying. Now they've claimed his App is poorly developed and making wasteful amounts of API calls- so now he's posted a large swath of code online to disprove that also.
Mostly interface, some say it is more simple. It does both the aggregation and communities like Lemmy and microblogging. It also does some sort of microblogging related to the individual communities but I don’t really understand how that feature works.
Somebody could use it instead of lemmy or mastodon, but it also federates to them so nobody misses out.