I see the #Gab federation as absolute win.
Predicting the future:
- Gab finally switches to their Mastodon fork
- some Gab users switch to their own hosting, as Gab source code must be open since Mastodon is on a strong copyleft license (AGPL-3.0), so they have Pro features for free/much cheaper
- Gab.com dies, as their financing doesn't work anymore, but the source code is again forked by someone and it's a good contribution to fediverse, some improvements even get commited back to Mastodon