I would say it is unlikely that someone would try and pull the same thing again. Especially of someone like Galfond who is not making much money of RIO as he shows in an interview with ChicagoJoey. He just does it for the project itself, to make a quality product that benefits the community. So it seems like making every penny he can won't be a priority. As I am sure he pays a pretty penny for the roster of pros he has on the site that have won millions, and his videos alone drive prob 10% of all traffic.

Just check out his post :D
http://www.runitonce.com/chatter/a-poker-site-should/

This video is also pretty neat by Joey