StubHub is a marketplace for event-goers to buy and sell tickets to sporting games, concerts and theater shows. On the buyer side, StubHub risks tickets being bought with stolen credit cards or buyers deciding to dispute the charge (buyer’s remorse) When one facet of fraud is under control, attacks surface elsewhere. StubHub had to look for such fraudulent transactions in a different kind of way: rather than seeking bad transactions — things like failed log-on attempts — they started looking for ways to catch an increase in the velocity of good transactions.”]
Source: https://www.csoonline.com/article/2131575/stubhub-scalps-fraudsters.html