The argument is that App.net has a business model that isn't going to work, not that it has a business model at all. A business model doesn't guarantee revenue,

The argument is that App.net has a business model that isn't going to work, not that it has a business model at all. A business model doesn't guarantee revenue, here is a business model I am going to sell rubberbands for $1000 a piece and it only costs me $.05 to make them. Great business model but that isn't going to get many people to buy. This is a very niche product that will work if the expectations are kept in check and they understand what they have is a niche product. There is nothing wrong with having such a product you just have to make sure your goals are aligned with that. I wouldn't consider myself the average user for these services (Twitter, Facebook) at all as my knowledge on tech is far beyond the normal user and I have absolutely no issues with the way these services are monetizing. The average consumer who uses the services couldn't care less about the ads nor would they pay anywhere near the amount being proposed.