It appears to be a polish instance - I can’t see any spam from their domain appearing in our logs as of late, can you point to examples?

It’s the default SMS application on Pixel devices.

deleted by creator

This (rabbitea.rs) is their link, primarily.

Hi There! This instance is a general purpose instance. We’ve got a couple fairly sleepy local communities and federate with all the cool spaces.

It’s run by Lagomorph Labs, which names all its projects after rabbits. It’s not necessarily themed in any way.

You should check out the OpenNic project, which is an organization that has already attempted what you’re describing.

https://www.opennic.org/