The last round of employment for a qualified pilot was probably in response to a new aircraft arriving or one of their pilots chucking their notice in. This scheme seems to be based around having someone qualified and sat ready doing camera operator and ground ops duties under the shadow of a bond until when/ if a pilot job becomes available obviously the cadet might be sat for a long time waiting for a pilot job. I seem to remember that in the long distant past they wanted 800hrs minimum before applying so that minimum seems to have gone out the window. If a pilot job becomes available before the cadet qualifies they will have to absorb the loss of a pilot or advertise for a qualified pilot. Also, as MJ points out they will have a cadet who is happy to be in low paid employment doing menial jobs while someone else pays for their training, that doesn’t make it morally right or ethical but they’re not in business for the morals or ethics.