R&S is pretty much a very large military/government contractor and to be that, they have to be very careful about some things and obey by the rules, very strictly.
And since that is their core business, that takes priority.
So basically, like Rich said, without going into why, they are not happy to do this to small/private companies and individuals, but it is a cost of doing "that other" business, that is real breadwinner...
And this change is here to stay. And get even more strict with time, by the looks of the political situation now...
I don't buy it that they have to stop supporting private customers for whatever compliance reasons. That does not make sense as long as they still sell products to individuals -- which they do, via distributors. Some products for military use have always been restricted, I'm sure, and will continue to be; that's not what is behind the current initiative.
This seems much more like a "too much support cost for too little gain" situation, i.e. a pure cost reduction play. In which case I cannot understand why they restrict access to the download portal and make end users jump through hoops to ultimately obtain the same information via distributors. I could understand a "individuals can't talk to our support staff, that takes too much resources" policy. But if a well-maintained document portal is already online for commercial customers, why not let other customers access it?
Well, you can buy it or not, but that is definitely part of the reason.
And you are not buying it because you think like an engineer: when you are posed with a problem your instinct is to fix it, solve it. The problem.
Corporations are run by economists and lawyers.
They solve the problem by choosing what solution cost less (economist), and by shifting blame (lawyers).
So if small volume of business to certain market is threatening large profit margin market, they prioritize big, certain money in big chunks with long term contracts over what is basically consumer market with unsure outcomes.
And if fine cost less than solution, they are happy to pay fine and move on.
And don't worry, they will still sell to those "secondary markets", but now they have a distribution contract with some company that specializes in consumer and small business sales. They sign all kinds of security contracts with them, where that OTHER company GUARANTEES they will not sell to those people they are not supposed to. And deal with pesky GDPR or whatnot.
And funny enough, USA still considers encryption technology a controlled technology, and funny enough fact that R&S FW image is encrypted (to prevent decompiling) is enough to trigger export control from these dimwitted bureaucrats.
And since keeping track of what is and what is not OK to distribute is never ending and ever changing maze of rules worth of Kafka making a new book, they simplify.
With government, MIC, military, and large industrial contracts (that are mostly also companies that are also under same rules through their own customers) they do paperwork and sales directly.
Rest is practically outsourced to distributors, through contracts that put all the blame for goods ending up in "wrong hands" to distributors.
See, the goal is not to stop proliferation in "wrong hands". Goal is for somebody else to be guilty, if that happens, and for their hands to stay clean.