Freemium is a nice concept for me. Let's take two examples, Flickr and Dropbox. I'm a heavy Flickr user, and their premium account is cheap, worth the price fo

Freemium is a nice concept for me. Let's take two examples, Flickr and Dropbox. I'm a heavy Flickr user, and their premium account is cheap, worth the price for me, and still a good deal for them. They still make money! Let's talk about Dropbox. In fact, I don't use premium with them (I'd love to have a yearly 10GB plan for 30$ or 40$, but they just don't have it). I don't exceed more than 1GB used, and that's not a big spending for them. But I do attract some friends to their awesome service, and why not, some heavy users (did someone mention my dad?). Free means satisfied users and word of mouth advertising, which is really underrated. And premium means money. Just make it worth the price, and "paint" a clear line between what's fair using free and what's worth paying.