Actually people, the issue here is to increase benefits to subscribers, which in turn may increase subscriptions, which may help Sean out.
The idea of being a subscriber reducing the number of 'defaulters' (gee, that's a much cooler word) is moot actually. Of the 3 folks on THAT list who came from the Group Exchange, all 3 are subscribers. Of the 14 in total from all exchanges on THAT list, I haven't done a detailed search, but I would say more than half are subscribers.
Again, this is way to help Sean increase benefits to being a subscriber which in turn may increase the subscriber base. At least contribute to it.
If the Group Exchange were subscriber based, the Blind Exchange can be open to all as a teaser/training ground to particpating in the Group Exchange and becoming a subscriber.
Just a thought.