https://motherboard.vice.com/en_us/article/9kzyv7/porn-sites-are-doing-the-most-cryptocurrency-coinhive-browser-mining

Recent tumult in cryptocurrency markets hasn’t stopped unscrupulous websites from hijacking unsuspecting visitors’ computers to mine digital coins.

According to new insights published on Wednesday by Chinese security firm 360 Netlab, which used a tool called DNSMon to track the relationships between domain names on the internet, 241 of the top 100,000 websites by traffic according to Alexa contain code that uses site visitors’ computer hardware to perform calculations that generate cryptocurrency through a process called mining. Of these sites, 49 percent were porn.