I wounder if it was tagged as "data center" by default without knowing who/what/how it's actually being used. It certainly wouldn't be considered the most privileged (residential) by default.

It doesn't matter if it's "clean" and has never been in any spam/abuse blacklists. Apparently it is (wrongly) assumed that a data center IP is someone scripting/scraping, or worse. Ignoring the fact that actual humans do work and visit data centers and use their Wi-Fi.

That actually makes sense to me, then. Not a 'normal' residential IP = higher chance of fraud.

But that means you've also got no rep as a neutral IP either.