It was quickly closed with the blurb "Unfortunately, we can't analyse the site for you or do a reputational deep dive."
Meanwhile, in the "Related Questions" sidebar, there's a question "Anyone heard of this site and is it safe?" which got answered with details, which obviously means my question wasn't off-topic or prohibited.
I checked the rules for what is on-topic and off-topic. I don't see a specific rule that my question broke to get closed. All I'm seeing right now is a double standard.
If this stack exchange isn't the place for my question, then where can I post it? Is anyone going to help me? At least can you please give me pointers on where to ask it or where to hire a professional computer/network security contractor to look into this?