They’re pointing out the hypocrisy in this website. The comment itself isn’t hypocritical as they haven’t taken a stance on US versus EU services.

They didn’t explicitly point to hypocrisy as the thing that makes it “unserious.” Actually I think a lot of serious projects are a little bit hypocritical, a little bit of hypocrisy is often the cost of contact with reality.

In this case it isn’t even clear where the hypocrisy comes from, though. It’s a service for looking up other services. Does it even handle any PII?