I love it when people invent motives for others and then absolutely convince themselves 100% that is what's happening. Your theory flies in the face of Occam's razor. You don't realize how much this hurts your credibility.
How about he didn't want to take a pay cut (I believe on a 1-year deal) to play for a new team and decided to test free agency because that's what most guys (who put up solid numbers on a terrible team and still want to play football) would do in his position? Naw...clearly he didn't want to play at all. He foresaw that he would get blackballed. Naturally, he was thrilled by the idea of not playing sports anymore and becoming a martyr.
Imagine him sitting in a smoke filled room in 2017 thinking to himself "...and then Nike's going to give me all this money. Muahahahaha."
There is no way this is what he was going for.