Why? Developers will make money off it, the whole idea is that developers will never get screwed by app.net, and they introduced a developer incentive program to help compensate developers. If you're interested in the platform how is that not worth $5 per month?
Where is the guarantee that developers will -never- get screwed by App.net? Especially since the barrier to entry is $100? The DIP is a nice addition that will help those with solid ideas out of the gate, but they are still greatly restricting the developer pool by a pay-to-play model. Along with that, I still have seen no compelling reason to pay $5/month to be a member of a social network where there are sub-20k users who (I assume?) barely use the service.
App.net is just capitalizing on those annoyed with Facebook/Twitter developer policies. Great for their bank account and a really smart idea, but I still don't see value for anyone else. As someone else once said, "App.net is a social network for people who have $50 to show-off that they have $50 to blow." That's not a party I feel compelled to attend.
It's bad enough I spent $50 to read it. I'm not going to pay $50 more just to mess around with trying to create an app for it. It should be free with membership to create an app for it, and charge the $50 when the app has noticeable traffic.
I didn't realise they charged an extra $50 for developers. The original comment made it sound like he wanted it 100% free. I agree, they shouldn't be charging extra on top of the membership.