Isn&#x27;t this business model plain extortion? If you want to create an open-source adblocker, fine. That&#x27;s your rights to publish that software, and it&#x27;s within the rights of users to run that software.<p>But requesting money for making modifications against the interest of users to the default settings of that software is just sleazy; I can&#x27;t think of anything that would make this sleaze illegal, but it&#x27;s still no good.