Ofcourse they ain’t making shit from custom domains. Anyone who is interested in connecting a domain to their Bsky account and has the skills or patience to learn how to probably already has a domain bought at another registrar to connect to.
But up until recently, Twitter used the blue checks to verify identity. Bluesky (as far as I know) doesn't verify anyone's identity. Instead, your domain name is your verification.
Yeah, business are pretty much the most consistent in verifying via domain. They get shouted at for it as soon as they join. Now most brands know to do it ass a measure of, idk, good faith in the platform and its norms.