Bitmain also don't support Paypal or Credit Card what you will say about them now?
They do accept wire transfers, which in some cases can be reversed as well. I don't like to praise Bitmain in any way, but they do run a legitimate business that has been selling miners for many years
It's a .com.au Business domain so whois info won't work the way you are looking, its registred with Australian Business Number.
I looked it up and that indeed seems to be the case. Namecheap and a few others only allow you to register .com.au domains if you're a business located in Australia so I assume that it is a globally enforced policy.
I still stand by my previous comment. Use reversible payment options just in case.