For the Hootsuite university you should not charge anyone until you launch the first course on May 1 & you should allow certified people to remain on your directory. I think this is only fair, as some of us have signed up to get your discount but can't complete any courses until May 1. Also if someone becomes certified they should be able to stay on your directory even if they cancel their account. If you do the work you should be rewarded not penalized.