Do you have a link? I’d be curious to read it

I think the lack of actual building suite/street address in the email signature in the very first email would have immediately made me extremely suspicious. That's about as good as "Totally real business address, trust me bro, Singapore".

Also some kind of company main phone number in an email sig is a thing I'm expecting, even if it almost certainly goes to an IVR system, or the email sig doesn't have an extension number in it. But if a person is reaching out to me with a hand crafted email I'm also going to consider them a bit more suspiciously if there's no phone contact in the email sig.

Further, .xyz or similar as a company domain name is pretty damn suspicious when, for example, luaventures.net isn't taken as a domain name. 99% of the time when I see .xyz it's spam/scam/phishing disposable domains.

There was a DND episode about fake online schools run from overseas springing up to soak up US college grant money that was being given out. The schools were built well enough to fool some one not that interested into thinking they were a real (but probably kind of crappy) school and had actual online classrooms with minimal assignments. Every time the government got wise to one they'd just shut it down and spin up a new school with new materials to stay ahead.

IIRC this before AI so I expect this kind of thing to accelerate since it should be a lot easier to spin up a whole fake narrative for some one to investigate. And since so many real companies are using AI and AI generated images now recognizing AI generated sites won't even be an actual tell.

The age of per person bespoke scams for increasingly small potential payoffs is upon us.