This is a way to make sure that only fans buy tickets, though. For example, there are people in Japan buying tickets to a Bon Jovi concert in Boston, who wouldn't ever even think about going (and might not even be fans, for that matter). They just buy tickets online, and then when the concert is sold out, and people are desperate to buy tickets, the people can put these tickets up on eBay at ridiculous prices.

Bon Jovi might not be a good example because their prices are ridiculous anyway.
But this still happens for most any concert or major sporting event these days.