Too expensive, I guess.
I feel more uncomfortable for wasting another USB port than for having to be online while playing.
And by the way, for your information, Rise of Flight has dropped the online activation since quite a while
The developers listened to the player's wishes and now everyone's happy.
I'd vote for either RoF or DCS/Flaming Cliffs 2 style activation. No drivers or anything like that, just activate once (i.e. type the code written inside the package) and you're free to go.
I can't see why it wouldn't work.