There’s an interesting discussion on the Record of the Day messageboard about the cancelled Eminem tour: the people who bought tickets are being given their money back – but the people who paid for the tickets aren’t necessarily the people who have the tickets, particularly now that half the world seems to be flogging concert tickets on eBay.
As “zanefan” points out:
If they are ebay touts (>80% of them) most will refund the face value to keep up their feedback.
However, “a” responds:
[You] can only leave feedback once and most buyers would have done so after receiving the tickets.