How many of the people who pay these ransoms do you really think are hit again? Very, unlikely.
Additionally: How many of the people who do not pay these ransoms do you really think are hit again?
Huh? People report extortion and muggings to the authorities routinely. Combining that with surveys to estimate non-reports should allow us to get a very good estimate.
> How many of the people who do not pay these ransoms do you really think are hit again?
About the same number as people who do pay: Few.