KickstartCassiopeia has many features. You can choose to use all of them on all your pages, or for instance, use the popup on selected pages.
The power of our solution is that it's a module. And Joomla has the option to publish this module on specific pages.
The module has a tab, you can use to set this up:
You can use 'all pages', 'only on the pages selected', or 'on all pages except those selected'. The last 2 options enable you to add pages to your selection. When publishing the module more than once, make sure you do not have overlapping settings. Make sure that if you publish the module on only one page, make sure another copy does not have the setting 'on all pages'