Well, as i said two years ago, get Ghostery and block everything. NO more popups. And if you have malware installed, get malwarebytes from malwarebytes.com and run it to clean up the system for you.
One last thought: Mac product developers need to get their product out for people to know about before they can sell it. That's ok. But what's not ok, IMHO, is hijacking my browser with a popup to do so. And the perpetrators of these popups are generally not the better developers anyway, and best avoided altogether.