It seems to me that it would be hard to target users with such a wide range of experiences (beginner to expert). I'm not familiar with adaptive learning techniques, but if I'm a moderate level user, I wouldn't want to sit through too much beginner level stuff to get through to the more advanced levels.
As far as paying for a service. I think that most users would have to consume a lot of your product before they're willing to pay for something. Look at Michael Hartl's Rails Tutorial. He's giving away the content for a high quality book for free in order to generate a user base. If Railscasts had started out as a pay site, I don't think it would be as popular as it is today. But if Ryan Bates started doing advanced level episodes for pay today, then I'd probably sign up. I guess when I'm hacking all day at the computer and I run into a problem, I'll be googling for quick answers and be unlikely to take time out for a involved tutorial. My brain expects short, quickly consumable information from the internet. When I want to learn something in depth, I still like a good book to take some time away from looking at a computer screen. Good luck. -- Posted via http://www.ruby-forum.com/. -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk@googlegroups.com. To unsubscribe from this group, send email to rubyonrails-talk+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.