With all the fuss over in browser mining I could see some small benifits for certian implimentations for websites.
Small/short term "special" member upgrade - short day/week passes.
Member enchantments - (there are a couple of paid add-ons that allow for this)
From a website owner's perspective the Coinhive captcha works exactly like a conventional captcha, such as Google's reCaptcha.
The captcha is embeded in an HTML form, runs client side in the user's browser and generates a token. The token is submitted together with the other form data. You...