These are all sort of true. The actual fee for departure agreements are closely guarded secrets. (redacted)
It was apparent based on the differences in these agreements that there was no standard boilerplate contract language employed, even amongst carriers working for the same major. Also, it was apparent these deals are hotly competitive.
What I saw would be years out of date now. Still, I doubt any one posting on a web board has any inkling of how these agreements actually work. The agreements I saw had all sorts of reimbursements, bonus money, pass through costs and allocations of liabilities. My impression is that ACMI contracts were probably where these F4D contracts probably originated in form.