Semi-decentralized social networking site with micro-blogging, running on the Mastodon decentralized network. Started as a free speech alternative as result of the massive, political censorship on the big social networks.
Gab will not work without centralized DNS.
It will work without central servers.
User accounts are not in the user's control. They're controlled by the service provider. It's unknown or is not applicable if Gab supports cryptocurrency monetization.