Not really, no. There is a refund policy that kicks in if we make a material change to the program, but otherwise it is a non-refundable subscription. There has not been a qualifying material change since Hive forked from Steem, so new members (and new enrollments) since then do not qualify.

Units are transferable with a minimum increment of 10, so there is a little bit of over the counter market, typically at 0.50 HIVE (since 1 HIVE creates 2 units).