Website owners are receiving emails threatening to ruin their reputation if they do not post a five-star review for a cryptocurrency exchange. The extortionist claims they will create millions of backlinks to our site from porn sites to ruin our reputation. Coinmama CEO Sagi Bakshi told BleepingComputer that they are not responsible for these emails and are investigating the attack on their reputation. In June 2019, a different extortion scam targeting web site owners was making the rounds. In that campaign, the scammers threatened to ruin a site’s reputation unless they paid $2,400.
Source: https://www.bleepingcomputer.com/news/security/scammer-extorts-site-owners-using-porn-backlinks-threat/