I notice that on the YAHOO groups BIAB forum, there are a lot of "MIDI ONLY" people who have stopped upgrading to punish PGMusic for not adding the features they want. Once a person feels like they are no longer a customer, they stop considering more purchases.

Using a sociological model, People who feel alienated can be reclaimed by a group if the group reaches out to them and gives them a point of re-entry that enhances or maintains their self esteem, and does not make them feel like they had to abandon whatever convictions led to the alienation.

Offering retroactive free lifetime updates would be a gesture of good will that (I believe) would provide an easy point of re-entry for alienated customers. Once they see themselves as being current users, it reopens the consideration of new purchases.

People who haven't considered real tracks in the past will definitely be surprised to hear what's possible now. Once those folks have the latest engine, and the ability to purchase a few specialty real-tracks for a reasonable price, I think they will want more pie.