Cosplay Girls, San Diego Comic-Con 2011, California, United States

Overcrowding
Capacity attendance at Comic-Con in 2006 and 2007 has caused crowding issues. Concerns have been raised that the event is possibly too massive for the San Diego Convention Center, Comic-Con's home through at least 2015. In 2006, Comic-Con, for the first time, had to close registration for a few hours on Saturday to accommodate crowds. In response, for 2007, Comic-Con introduced a new three-day membership that did not include Saturday. Nevertheless, the 2007 show went on to sell out Saturday, as well as Friday and Sunday for the first time. Additionally, both the four-day and three-day memberships sold out for the first time. For 2008, the three-day memberships were abandoned and the convention decided to sell memberships only in advance, with no on-site registration. In 2008, all memberships were sold out before the convention for the first time ever. This sellout has given rise to the new phenomenon of Comic-Con memberships being scalped for exorbitant prices on websites such as eBay and Craigslist.
In April 2008, David Glanzer, Comic-Con's director of marketing and public relations, commented on the organization's desire to remain in San Diego: