He didn't do anything for before B&R in 3-years, which was BS, which was pretty much a bust, no touring in 3-years, no hit singles in 5-years, 2-3 hit records IMO, can't sell out arena's in 1-minute like Katy, seems to have a good lifestyle appetite and with artist not making much money after everyone pulls their dirty mitts out of the cash bag (so they say), I would think he needs "new money" coming in to feed the "appetite". 

C'mon, the Katy duet and Ocean tracks were 100% money/marketing motivated as was Paper Doll, all while JM laughs his way to the bank, no, sorry, it was Katy who laughed. The Ocean song is the worse of the three, truly insulting and quite "Frank-ly", no pun intended, track doesn't do Ocean any artistic justice.

I don't blame JM and not knocking him, heck I would've recorded Jennifer farting and released it as a track, but with Mayer not likely to have another Your Body Is A Wonderland giant hit being past the cash cow crowd teen audience, he smartly piggybacks with other artist to cross pollinate to reach a broader audience to sell more units, throws his name into the Country cash cow hat too, etc.... I love the business side of it and not saying the duet is a bad song, geez, pull Mayer's finger and he'll fart out brilliant song he's so damn great.