Hello,
We used newsletter popup classes for the link http://prntscr.com/l04z5u and just added popup content in Promo popup area (Theme Options > E-Commerce > Promo Popup > http://prntscr.com/l04zrj )
Also, you can try the Massive Addons Lightbox feature http://massive.mpcthemes.net/lightbox/ http://prntscr.com/l050d1
Regards
