It was also driving me to the point where I was ready to throw my iPad in the drink.
Went to app store and downloaded a free Blocking App called 1Blocker. This was not able to keep this particular pop up out as it is not on their 'free' list. Spent $7.99 on the premium version and 'voila' all fixed.
Mental note to self: NEVER buy anything more from Apple - or anyone else who invades my space - until they cease and desist with this intrusive marketing.