Hasbro's relationship with bronies has been to retain extremely tight control over bronies, tell furry cons that they are okay with materials being traded / sold but absolutely _ZERO_ things directly from the show can be shown or heard (including fans SINGING the music), etc.
There's a pretty common fear amongst con runners that the Brony thing will end soon. Forcefully.
Hasbro's relationship with bronies has been to retain extremely tight control over bronies, tell furry cons that they are okay with materials being traded / sold but absolutely _ZERO_ things directly from the show can be shown or heard (including fans SINGING the music), etc.
There's a pretty common fear amongst con runners that the Brony thing will end soon. Forcefully.