They have presence, but no oversight, because they have been structured to either avoid interventions by antagonistic bishops (usually the case with orthodox ministries) or to create plausible deniability for sympathetic bishops (usually the case with heterodox ministries).
As a UMC ordained pastor my Conference leaders demanded that my agency and its holdings be removed absolutely from demoninational involvement. They later asked for my resignation for operating outside the denomination. The madness goes on.