If you add up what these articles are saying two of them references something that happened "when they played in Tawain" and they're not scheduled to play in Tawain until the 28th so that part can't be true. Also one article says the shows are sold out so that could be why tickets aren't available.

So at this point, I would say it's just a rumor and not worry about it too much.

PS: For the hell of it, I tried to find tickets through BonJovi.com and there were still a handful of of good seats available--two in the VIP section a few in the yellow section, so they're still selling them.