PROs have been criticised for charging non-profit organisations for their use of copyrighted music in situations where the non-profit organisation was not earning money from the use. ASCAP, for example, was eventually forced in the face of public opinion to abandon its attempts to charge the Girl Scouts of the USA for singing campfire songs. ASCAP's and SESAC's policy of charging non-commercial educational (NCE) radio stations for playing copyrighted music has also been criticised, especially by college radio stations across the U.S., which rely entirely on student and listener support for funding and have difficulty affording the extra fees. Community Orchestras, which mostly play classical works in the public domain, may occasionally play a work within copyright, but are forced to pay licenses to rights societies on all concert revenues including concerts where all music is in the public domain, which is then distributed to songwriters of pop songs.