The close [X] button at the top right of the CoD ads when you hover over them is almost impossible to see currently. If you insist on advertising Activision products in the Blizzard launcher please at least make them easier to remove.
To be clear, I generally have no issues with related merch (e.g. WoW merch advertised in WoW section of launcher) appearing, but if I wanted to know more about the Call of Duty franchise I’d have clicked on that section of the launcher. Having ads be very closely related to the content they’re inserted into makes them more targeted at the audience and feel less intrusive.