I did web dev for many one-off projects, and very often this is the case - that the people are non-existent. When having an altercation with a customer, one of my guys even fired the non-existing support person, and then another non-existing support person took over, apologized, and made amends with the client.

So yeah, at least this guys is somewhat transparent. And with services like my primary email address, I only trust longstanding, reliable services, nothing fresh, nothing beta, nothing with the bus factor of 1. But with the custom domain, at least migration is not super hard maybe? Just hope that it doesn't happen during a 2-week vacation or something.