User blog comment:Redgarlic68/‘Phineas And Ferb’ Creators Sign Deals With Disney For Series, Feature, Potential Spinoff/@comment-406459-20110825211806/@comment-4171941-20110826230246

I always assumed that they were getting royalties(as rightly so) so I am glad to find out it was the case, and anyway didn't they already royalities from the soundtrack(s) since they are the main songwriters?