Protonmail Dark Pattern?

I remember when bing used to do this on their mobile site, it would load then I would go to tap on the search box to focus my cursor and just as I was about to do that it would pop in an ad for their mobile app. Then I would have to close out of the play store and get back to actually searching.

Now it seems that protonmail is doing something similar in that I navigate to their mobile site, wait for it to load. Once it’s loaded I go to tap the menu icon and just before I do the pop in for their app appears and again off to the play store I go. about to click