But why??? - I have used Autotweet for a very long time - and for as long as it was with 1st Movers it was simple matter to install it and add your channels - but since you have got hold of it we are all supposed to become Facebook App Developers!!! which seems like we are doing your work for you - if we need to make our own apps, why do we need to pay you at all? Personally I think you have destroyed one of the best Joomla components ever developed.
The old component has also this dependency. The 1st-movers site and the associated legacy Facebook App are not longer available, and the old installations are not working. They need to install a newer version to authorize the channel access (now tokens expire every two months).
We are now actively communicating the dependency to promote the App creation, and avoid an ongoing dependency on our availability.
Also, the Facebook App requirement has a real cause. It's your identification to access Facebook. For example, if you share the same access with several users, you are tied to their service/behaviour. If one of them breaks the App, Facebook can ban the App to all of them.
At the end, it's better if we encourage the Facebook App creation, and you are more independent from our availability or our the App service.
Please, let us know if you have a better proposal to shape our service.
PD: We can offer a Facebook App monthly subcription, but we've avoided this hosting service to be focused on the software product development/support.