Only because desperate NFL teams will do desperate things. The Vikings finally saw the light and realized he was never going to be the “it” QB.
Now the Falcons are desperate and want instant results at QB instead of drafting one. So he again benefits financially. Good for him.
I think the Vikings would have liked him back, but if he was going to take a discount, which Kirk doesn't do. That limits the ability of you to build the rest of the team and part of the reason the Vikings didn't have more success.