It's not a big scam. I ordered from them a few days ago. They did ask for the "TAX ID" number as he states below but I just put in 00000000 and guess what? It worked just fine. No issues at all. There's nothing shady or weird about it, just a different form utilized by them initially because where they are based, that information is probably needed for tax purposes.
On the internet, different places do things differently and they aren't all scams or horrifying breaches of personal security.