Very interesting WHBM and jogs my memory from an article about ten years ago, where many carriers were finding that their obligations of FFMs already issued were weighing heavily on their balance sheet. They had (IIRC) to start aging them ouy and inducements to get people to use them up. Lastly, it was thought that, for smaller companies, the amount of FFMs that could be used would adversely affect a prospective buy out of the company.
As always, I sit to be corrected.