NFL Team A says to CFL Team B we would like to sign player C, we will give you $X if you release player C. Without waivers player C is now a free agent and signs with NFL team A instead of being able to be picked up on waivers by another CFL team. At least this is what I can gather from the idea, but don't know the CFL waiver process from the old CBA since teams seemed to release guys to try the NFL before without them having to clear waivers.