pop-ups that lower price?
 

I've seen landing pages that if you try to leave the page a pop-up appears that lowers the price to better convert into sales. Does anyone know what this is called?

I want to do something like this on my landing page but can't seem to find info on how to do it.

Re: pop-ups that lower price?
 

I wonder the same thing.

For Wordpress I know there are plugins, but which are worth a damn?