Surfers don't really know the difference for the most part, BUT webmasters do.
So where non-exclusive will hurt you is when trying to get affiliates to join your program. You can't give them content to build pages with (well very little content anyways) and with your FHG's and RSS feeds or whatever else you offer, there are alot of other programs using the same stuff, and the webmasters are likely going to choose the established program paying per signup as opposed to the newer program that's only paying revshare.
