> extort - (transitive) To take or seize off an unwilling person by physical force, menace, duress, torture, or any undue or illegal exercise of power or ingenuity.
This is taking money from an unwilling person by duress, using an undue exercise of power (ie control of bad reviews on their platform).
Duress? LOL. What duress? If they pay, the situation gets better. If they don't pay the situation remains the same. Your claim is ridiculous. In any case the situation never gets worse so there is no duress.
This is taking money from an unwilling person by duress, using an undue exercise of power (ie control of bad reviews on their platform).
https://en.wiktionary.org/wiki/extort