Google will downplay mobile websites with intrusive pop-ups
 

It's bad enough when you deal with third-party pop-up ads, but it's that much worse when the site itself shows pop-ups. Do you really want to subscribe to that newsletter before you've even read a single word on the page? Google wants to put a stop...

https://www.engadget.com/2016/08/23/...-with-pop-ups/