This is SO true!
Simply put, the web 2.0 model is based on 'you' doing the work, and 'them' collecting the reward. Monetizing user engagement is specifically how it's been built, and it reminds me very much of The Dark Crystal.
If you've made your business inside the web 2.0 model, you are essentially shackled in cage, just waiting to have your essences drained dry!