duia.us is a personal domain that has been registered since 2014, which normally would be a mark of stability. The owner's identity is public in the WHOIS records — a real person in Romania with a phone number and email. That level of transparency is actually reassuring for a personal blog or hobby project.
But there is a big problem right now: the site is not working. Visiting duia.us gives a 404 error, and the SSL certificate is configured for google.com, not this domain. That means any attempt to connect is technically invalid, and the site won't load at all. This could be a simple misconfiguration by the owner, but it also means there is nothing to evaluate in terms of content or service.
If you are wondering whether duia.us reviews or duia.us is a scam, the honest answer is that there is no functioning site to review. The domain itself is old and clean of blacklists, but until the technical issues are resolved, you should treat it as a non-functional placeholder. Check back later if the owner fixes the site, but for now, avoid relying on it for anything.