A place for them to communicate with their people without discord-honeypot gulag. You could do social badges of course - e.g. community creator, invited community creator, invited community member etc (see github examples). If someone already found their way to flotilla, and they stick around it...

A promise of Flotilla actually reaching feature parity where important with Discord is more than enough. Let early adopters feel involved by taking feature suggestions and make it easy to see progress being made towards the goal (could eg. be a Github issue called "Discordification with a list of ...