In reply to Rififis:
Here in Ariège there are topos for pretty much all local crags available for free online on the Ariège CAF site, which is a hugely useful and valued resource. The only physical guidebook I ever see people with nowadays is the Rockfax (which I co-wrote), which gives far better coverage of crags for English speakers, uses photo topos instead of line drawings, and gives a much better idea as to which of the routes may be great and which are awful!
As for income, it's true that I receive a very small income from guidebook sales, but then again I've equipped 5 new sectors and I've been happy to distribute topos for these to anyone who wants them.
Paying for basic route information itself is very much already a thing of the past. What people may still be prepared to pay for is value added features such as a printed book, an easy-to-use app, and more detailed crag/route advice.