Having data means nothing if you can’t monetize it.
As you say, AI can already access it all completely for free with nothing more complicated than a web crawler. Long term, charging AI firms for access is not a viable strategy unless the law changes.
And they’ve been trying for years to monetize visitors through advertising and other schemes, and so far come up consistently short.
Looks like a standard GTK4 app to me. Whether or not that is to someone’s tastes is obviously subjective, but it uses the same design language as every other GTK app under the sun.
GTK apps always look out of place on Windows though. Looks far more sensible in its native environment (i.e. *nix running GNOME).