Well, for me, it provides a way of experiencing things like having to respond to user feedback, traffic spikes, thinking about user experience and trying to inf

Well, for me, it provides a way of experiencing things like having to respond to user feedback, traffic spikes, thinking about user experience and trying to influence my conversion rates. It's an opportunity to use things like analytics funnels, and such. Most of these things can't be done without one thing - users using your site. These types of sites are fun ways to potentially get to deal with that. As developers, it's easy to think of things functionally. To us, it's obvious why something would be useful based on its function. But, to the average non-technical user, it takes some extra thought into how can you explain something to them in a way that allows them to understand your service and why it'd be useful to them. I kind of rambled there, but it's a fun technical thing. For users, it's purely just for fun. I think this might be something people wouldn't mind knowing if they had the opportunity, so that kind of helps drive the want to use it.