He did receive 20 mil in guaranteed money so that is all that matters. Of course no cap will mean every team will spend less, probably much less, and not more in an uncapped year.
Dude, (I'm not being a dick)...You need to understand what you're looking at. That chart is telling you what the team that loses the player in terms of the salary of the player they lose. Edwards makes 4.55 mil this year RFA works like this... Hence Edwards will get 5 mil....