The “Download our app” nag messages are a plague that isn't limited to Paypal.
Between “Don't you want to download our app?”, “Can we send you notifications?”, "What's your location?”, “Join our mailing list!”, "Accept our cookies!” and the inevitable popover videos, it can take seven or eight clicks before you even get to the bit where the web page asks you to turn off your ad-blocker.
The web didn't become user-hostile all at once, but now the frog is well and truly boiled.