Hello,
Thank you for contacting MyThemeShop today and sorry for any inconvenience that might have been caused due to that.
I apologize for the late reply as our team wasn't sure yet on the release of the pop-up feature.
You have the option now to hide the popup on mobile devices only.
You can indeed create a page, and in the page insert the subscriber box shortcode so that that page only has the subscription box.
Hope that helps. If there is anything, please let us know. Thank you.