iVAN...your claim of a contradiction was/is an error of comprehension on your part.
Stardock may wish wide access to Impulse for feedback, BUT AT THE SAME TIME may NOT want the OD release to go to 'established/happy/stable' users of SDC so released it to Impulse adopters/trialists only.
WHATEVER the reason, It is NOT my call, nor is it yours.
jpkylegirl gave a valid/legitimate reason...update/revision number confusion occuring with users of both Impulse and SDC. Sounds about right.
I doubt whether any amount of foot-stamping and claims of ignored queries will result in a revision of dispensing procedure.
As for ...
There is nothing to say that SDC will be actively uninstalled by formal adoption of Impulse, though it is perhaps a sensible method of handling such a change, but then again about that 'road'...unless you actually INSTALL IMPULSE YOURSELF you CANNOT argue otherwise. It may just work and like, wow,...you have your update and an end to the dramatics.
Stranger things have happened....
Get Impulse, install the alpha (unsupported) patch. Done.
The matter is closed.