Jason Snell, Six Colors:
On Saturday Rich Siegel of Bare Bones Software gave a presentation in which he announced that the next version of BBEdit would not be sold in the Mac App Store...Siegel’s talk was notable for its restraint and care. This was not a scorched-earth denouncement of the Mac App Store. In fact, at the end, he admitted that it’s not impossible that BBEdit might return to the store someday...
Jason goes on to list some of the issues were - and were not - involved in Rich's decision.
Sadly, it's the customers that get the worst of the deal. The Mac App Store is a far superior experience in just about every way. I'd like to see some of the issues get worked out, so it becomes easier for developers to offer their apps in the store.
Note: There have been other examples of apps leaving the Mac App Store, but leaving the store is probably a bad decision for most apps. It won't matter much for BBEdit, as its target users will likely find, download and install BBEdit regardless of where it's posted for sale. I don't think that is the case for most apps.