Well. A Dutch mountain... But you have a point.
But anyway Microsoft has always been helpful in providing a solution for free software in the cases that their policies harmed free software.
In this case, ultimately, e.g. have one or more certificates for the shop in place and a review board of esteemed programmers that eventually sign a binary (written by anyone, with a code review) ) on request is probably enough. You have to understand such things are not governed by marketing reasons. They are governed by customer protection reasons. Microsoft did not invent malware...
In the case of commercial software written in FPC, simply make sure you are trusted by Microsoft and its partners (the CA's) yourself. The barrier is not that high... (it was, but they reverted a huge part of it very quickly). That will take a modest investment.
Same goes for e.g. Apple's model.
And yes, at some point the professional liars (marketeers) will try to take over, but until now this has always been mitigated by higher management.... All major players in the software industry.
Sidenote: I never thought I had to defend MS