It turns out that ebook subscription models don’t work very well when people read too much.

There’s a big difference in consumption behavior between gyms and ebooks:

Scribd can’t afford to keep paying publishers the retail price of a book when so many people are actually, well, reading the books. If the hope was that ebook subscription services would be more like gym memberships — where people pay but then don’t go — romance readers have turned the model on its head by using the “gym” too much. That means Scribd might need to find a new business model, or enact a tiered system where users who read more pay more.

via What Scribd’s growing pains mean for the future of digital content subscription models » Nieman Journalism Lab.