My understanding is that the USO pays for expenses (e.g. travel) but does not pay for the performance. Again, if the troops don’t like a performer, don’t you think that would be apparent to the USO? They sign people on to entertain the troops, not to annoy them.
I don't know who is running the USO these days, but I sure hope they pay close attention to the troops' reaction to Griffin's "jokes" and to the deluge of e-mails (via the USO website and USO's Facebook page) re: Kathy Griffin and dump her - not pay her travel expenses to "entertain" our troops - and other scumbag America-haters immediately.
The USO is a wonderful, respectable and historic organization that serves our troops in a variety of ways, not just entertainment. Garbage like Kathy Griffin should have NO place in the USO.