I wouldn't assume that Adobe's Mighty will only work with Adobe apps. It is in Adobe's interest that it works with as many apps as possible.
You should expect to hear more around this when Mighty ships.
(Disclosure, I work for Adobe).
You should expect to hear more around this when Mighty ships.
(Disclosure, I work for Adobe).
With an SDK they can only sell more products, whether that is apps, hardware, or both.
Where they should limit their SDK use is in branding — they probably wouldn't want poor quality or badly designed apps advertising (or even using) the Pencil SDK. It would reflect badly on their product. So they need to maintain control in those cases.
They shouldn't allow "any kind of app." They should allow "any kind of app that meets their standards for quality."