Jackal you are absolutely right. But it is the inflation that makes such ways to lose their value. Looking on you tube for Dire straits, you might come up with hard to find videos, with less than 1000 views. There are way too many and the search results always benefit the already popular.
Or maybe, they all consider it a side project, and already have enough money and time (meaning that they don't live from it) so they don't wish to invest even a bit for it. Maybe they should hold a competition with some price, for the person to film an original video clip for one of their songs.