That RN has advertisements is annoying but necessary for the business case. However, now you have 'advertisements' that will lead you to another site where 'compagnies may get access to your device'.
This is not just poor digital behaviour, considering the numbers of minors that play the game - I also seriously doubt that it is legal - at least within the EU (and I am from a country which is a member of the EU) as the 'advertisement' doesn't demand acceptance (it just informs, and a click doesn't meet the requirements for''acceptance' according to regulations), nor does it specify which site you will be transferred to.
As said, this is very bad style and probably not even legal. As of now, I have already banned my son from playing as I will have neither his devices, nor his privacy, invaded by unknown compagnies.