That's because they probably clicked first on "Get" for PES, After clicking on get you will have a popup stating they will try to push an install, then the next page you land will replace "get" with the message you are talking about.On the PES 2019 page it doesn't have the "Get" button, only the "Install on my device" button, which to me suggests that it's a timed demo.
Anyway, it's still confusing.