several korean idol groups and solo artists have resented the contracts issued to them by their management companies, claiming that the decade-long contracts are "too long, too restrictive, and gave them almost none of the profits from their success". a director of south korean entertainment agency dsp media stated that the company does share profit with the performers, but often little is left over after paying costs. korean entertainment companies such as s.m entertainment have been called "factories" for their unique method of mass-producing stars. members of groups are frequently retired and replaced with fresh trainees when their age or musical inclinations begin to pose a problem. tvxq charged s.m. entertainment for unreasonable terms in their contracts with the company in 2009.