I believe that InstallMonetizer in particular designed the screen where you agree to install their crapware to look like other installers' EULA-acceptance page - see e.g. the second screenshot here http://www.little-apps.co.uk/blog/2012/11/why-was-this-other... In order not to get unwanted crapware, you have to click the Decline button, which would normally stop your desired software from being installed.