The news outlet Salon is allowing Adblock-using visitors to opt-in to using the JavaScript-based Coinhive tool [theverge.com] to mine the cryptocurrency Monero [wikipedia.org]:
Other sites have used cryptocurrency mining in lieu of (or in addition to) advertising. Sometimes, it's done surreptitiously without users' consent — The Pirate Bay admitted [vice.com] to secretly adding Coinhive integration last year, and hackers have planted mining malware [theverge.com] on other sites. In this case, it's an opt-in program; a spokesperson tells FT that testing started on Monday.
Salon has an FAQ explaining this move [salon.com].
Also at Ars Technica [arstechnica.com].
Related: Showtime Streaming Service Included JavaScript to Mine Cryptocurrency Using Web Browsers [soylentnews.org]
PolitiFact Hacked to Mine Cryptocurrency Using Visitors' Web Browsers [soylentnews.org]
Wi-Fi at Starbucks Buenos Aires Has Computers Mine Crypto-Currency [soylentnews.org]
Bitcoin Hype Pushes Hackers to Lesser-Known Cryptocurrencies [soylentnews.org]
Thousands of Websites Hijacked by Hidden Crypto-Mining Code After Popular Plugin Pwned [soylentnews.org]