it looks like the license these folks had did not cover the screenings so they got shut down
http://www.pollstar.com/news/viewnews.pl?NewsID=8468
[So who's the Big Bad in this story? The Screen Actors Guild started the trouble. Although McClung and the cast weren't necessarily making a profit, they were charging a nominal ticket price in order to cover the cost of materials and travel.
And as anyone in Hollywood can tell you, when there's money involved, the Guild pays attention.
SAG sent 20th Century Fox Television a hefty bill for unpaid actor residuals, causing Fox to take a closer look. The studio had been unaware of how big the sing-alongs were and got in touch with
Criterion Pictures, which had been granted a license to exhibit "Buffy The Vampire Slayer" and in turn gave McClurg permission for the Buffyokes, and revoked its license.
A Fox spokesman told MTV News
Criterion never had the legal right to allow the Buffyokes to take place, because screening "Buffy" theatrically or commercially was not part of the agreement.
Criterion issued a statement blaming McClung for the misinterpretation of the license that, like most seemingly hopeless situations in the Buffyverse, offers a glimmer of hope.
"Due to the terms of its license agreement with Fox, Criterion Pictures granted Clinton McClung only the non-theatrical distribution rights to Buffy," the company said. "As this event has expanded beyond the rules and regulations of the non-theatrical market, Criterion Pictures must restrict the screenings of this episode until such time as it has secured the theatrical rights which it is now diligently pursuing."
Several options are being considered to allow the shows to rise again in the best "Buffy" tradition, including the waiving of residuals by the cast and crew of the episode or screening it as a benefit show and asking for donations for admission.