https://arstechnica.com/information-technology/2018/02/salon-to-ad-blockers-can-we-use-your-browser-to-mine-cryptocurrency/

Salon.com has a new, cryptocurrency-driven strategy for making money when readers block ads. If you want to read Salon without seeing ads, you can do so—as long as you let the website use your spare computing power to mine some coins.

If you visit Salon with an ad-blocker enabled, you might see a pop-up that asks you to disable the ad-blocker or "Block ads by allowing Salon to use your unused computing power."