I wish they would just make the ad-hoc distribution mechanism actually useful, by extending the expiration to say, 1 year. This would make it easier for students/hobbyists/indies etc. to build apps for their own devices. Currently, if they build an app for themselves, it only works for 7 days before they will have to reinstall via Xcode.
If they later want to publish to the App store, I think it's completely okay to ask them to pay $99 then.
If they later want to publish to the App store, I think it's completely okay to ask them to pay $99 then.