If true, that the engine's mounts 'float' at some stage....
First, the idea w/AB is not to pinch the nozzle, to accelerate flow, but to enlarge it, to maximize the AB flow on the cross section of the nozzle outlet: expansion, not restriction, is the goal.
At the point where the mounts float, the gaspath is effectively and functionally part of the airframe.
No distinction need be made to define the gaspath as thrust, or drag, it is neutral.
The AB reacts against the mass of the gaspath, several tons of it. In such a powerfully dynamic status, it becomes easier to get how the intake provides such a large component of Thrust, and the AB
drag
It was always easier for me to understand thrust as exquisitely tied to its opposite, and compression also to extremely low pressure.
Don't mind me, I don't make any representation about this other than I think it has merit, maybe.
Lyman