This is exactly the kind of crap clubs pull that makes me a total advocate for complete player free agency.
These players are uncontracted and their clubs have nudged/ pushed them out the door at the end of long and honorable careers. As soon as GWS sniffs around the garbage can looking for scraps and castoffs these miserable pricks of clubs start screaming rape and demanding compensation.
As far as I'm concerned a player has a contract and fulfills that contract then end of story, clubs don't own players like cattle or slaves, it's a business agreement.
Only if players or clubs wish to break an active contract should compensation or trades be possible, and the loophole of all player contracts extending to after the trade/ draft period is the first bit of *smile* that should be abolished. Contracts should cease when the playing season is over.