It is not uncommon for companies to use "authorized resellers only" policies with their products. Even Microsoft has different support functionality on OEM versions of software versus retail/box SKU's.
In a case like this, it seems heavy handed. On the other hand, Customer X buys an OS4.1 FE emulation system off an ebay/internet seller, has issues with the OS. The Seller, again, not an "authorized partner" of Hyperion - may or may not be willing to, or even able to - provide a lick of help to said Customer X.
Customer X goes to Hyperion (and likely the Internet as a whole), griping about how their software is crap and "doesn't work" or something. It's pretty apparent why Hyperion would not want that.
I don't imagine Hyperion would want to be on the line for providing support for an unauthorized reseller.