Interesting project, I hope it takes off. Definitely a problem I've run into.

website may be grammatically incorrect

I only noticed three small mistakes.

Communities in Lemmy are only federated if a user is subscribes to them from external instance.

This should be 'subscribed' and 'an external instance'.

I think mods (including me) wouldn't to put effort into a new community

Should be 'wouldn't want to'.

Nice project!

This is also good because now more people can see where crossposts are coming from. Lemmy will automatically show other communities where a link has been posted to, but only in posts that have already been federated

And since the bot only runs on large instances they aren't going to have problems with storage space

Excellent tool. I'll be sure to make use of this.

Could a future iteration do something like use !newcommunities@lemmy.world to automatically boost them or do you think it should be only available on request?

Oh and thanks for flagging your accounts as bots (I just checked the feddit.uk one) - as they don't post, they're unlikely to pop up on people's radars but some people can get a bit twitchy if they aren't correctly identified.

Would you be interested in having different versions of this? I briefly scrolled the list of communities, and they seem very developer/tech-focused, which I suppose lemmy is. But I think it would be neat to have a tech/Linux/developer seeder, a humor seeder (memes, comics, funny, etc.), a sports seeder, a cute seeder (cats, puppies, animals, etc.), a gaming seeder, etc. Then the admin could decide what type of seeder they want instead of just getting everything, potentially with tons of things they aren't interested in having on their instance.

I say this because I am interested in sports communities and don't see enough of it, but the number one complaint I see on lemmy regarding content type is that there's too much sports content. I moderate a sports community, but I wouldn't feel right adding it to the seeder since so many people complain about seeing it.