Yes it says Fediverse. They probably do mean microblogs, where at least it's a real phenomenon. It could also apply to stuff like Pixelfed.

In the threadiverse, you're posting in a community, not your profile. It's on the community to downvote unwanted comments and on mods to remove rulebreakers. In a rare post an OP doesn't want any advice, like sharing art or a personal story, unless it's a written rule of the community it's on the OP to explicitly say so.

A neighbour I didn't know started it. I just volunteered to help, she moved away, I have four more volunteers helping so it's nearly no work individually. It's a citizen initiative, but we did ask the city for free stuff, namely an Ecoo compost bin and permission to use that spot.

I help run a communal compost heap, it's easy work and saves a lot of trash from going to the trash furnaces.

You can chat on different servers, so I'd say it's federated.