I'm not worried myself as I haven't bought a ticket (and I won't). thing is, a lot of people here in Portugal aren't too happy to own a ticket for a Richie-less show. some of them are actually 'demanding' their money back but, given what you folks said, I doubt they'll get a refund. shame, shame, shame.
Again, I tip my hat to Jon for keeping the show on its tracks.. a lot of money is at stake in these big tours to just call it off. a lot of people actually make a living in these tours and need to put food on their tables. and a lot of people booked flights and hotels to attend the gigs. no need to crucify Jon on this one for carrying it on.
On the other hand, it'd be only fair to reimburse the die-hard Richie fans should they want to.