I don't think the promotion and including the other band members is in any way contractual. It is still Jon's band from a business stance and he would be the signature on file. I think they are all trying to reinforce their unity - especially now.
Kind of surprised there was not a new thread on Jon's Sunday Morning TV interview - it was nothing new however and actually some closed body language as if he is tiring of the same old questions, but he has an album/tour to promote. Maybe as someone suggested we do need a fan to conduct an interview - you know you couldn't cross certain lines but some new questions would probably engage Jon a bit more. There are links on the show page and the one I enjoyed the most is this little snippet with David and Tico. They are not "told" to do this - they are reinforcing BonJovi 2017 because they want to imo.
http://www.today.com/video/bon-jovi-...d-895984707569