When you visit prdn.nl, you don't actually land on a working website. Instead, the domain immediately sends you to webconcern.nl, a different site altogether. That's an unusual setup for any legitimate business, and it raises the first question you should ask: who owns prdn.nl and what is it actually for?
For a domain that's been registered since 2011, you'd expect some kind of established online presence. A hompage that redirects without any branding, favicon, or explanation isn't how most real businesses operate. The technical side is fine — the site has a valid SSL certificate and hasn't been blacklisted — but the lack of transparency outweighs those points.
If you're trying to figure out whether prdn.nl is a scam or just a redirect placeholder, the honest answer is that there isn't enough evidence to say for sure. That uncertainty itself is worth paying attention to. prdn.nl reviews are nonexistent because there's nothing to review. My advice: treat this domain as a redirection point with unknown intent, and don't trust it with personal information until you can verify what webconcern.nl actually is and who runs it.