Dear Ashley Madison user. I know everything about you. Pay up or else.
https://arstechnica.com/information-technology/2020/02/four-plus-years-later-ashley-madison-hack-is-used-in-new-extortion-scam/
Four years after hackers dumped the intimate details of 32 million Ashley Maddison subscribers, criminals have revived an extortion scheme that targets people who used the dating website to cheat on their partners.