I think the answer is quite simple (wow, that sounds pretty arrogant): look at this site. You've got a couple of thousand people, let's say a hundred thousand world wide, who are nuts about Lambo's and are able to eventually buy one. Since the mid '90's (since internet evolved) these people are connected. This was not the case in the late 70's, 80's and early 90's. In those days I guess most of us were Lambo fans too, but we didn't know what the hell was happening. Nevertheless: Lambo survived, there was always some 'suit' with enough love for cars that said: 'we can't let this die.'
Even if Audi lets go, the company will still survive. There's just too much love for these cars. In this day and age it would only take a few American, European and Asian enthusiasts/millionaires to get it going again.
And for the time being: Lamborghini is making a profit !
Thank you Roy !