Free Content, Expectations and Monetization
Good free content attracts people. If successful, it builds an expectation of more free content and time. This creates problems for small businesses and individual content creators (bloggers, photographers, etc.).
First, once people get free stuff, they want more. More content, more time, even services and goods for free. They ask for it, and voice dissatisfaction when told they must pay. When told that some offerings are paid, communities and customers even get angry.