Not necessarily. I had a persistent pop-up when I got the new phone (but not the computer) - only had it here. Ad blocker got rid of it.
And that is how it works. It is an adware that attaches itself such that anytime you try to visit a site it loads the popup. That doesn't mean it came from the TPF site, it could have loaded with a previous site you visited either intentional or unintentionally. One thing I do find annoying (and again it's not TPF, but Google's targeted advertising), when I first load TPF I have to give it time to load the log in, otherwise you can accidentally click on one of the ads google is trying to force feed you.