This extension allows you to donate a certain amount every time you visit a website, in this case, procrastinate-prone sites. If you don't want to donate every time, just set your weekly limit to the amount you want to give, and then the extension will handle the rest. And you get notified every time you visit a website you set. There are also three donation charity options for you: the Red Cross, Watsi, and Girls Who Code. And there's more: you can configure it to always donate when you visit the websites you add to the blacklist.