Every time I go in . I have close out 8 to 10 pop ups, sumtimes more . It’s ridiculous and Annoying .it kills the enjoyment of goin in checking out my city. Game has been goin for 8 years .come on now,
Easy fix :
2 exit out . 1 closes all pop ups at once and another closes just 1 .that way if I don’t wanna see all announcements I just close all pop up at once. If I don’t wanna see the rest I close 1 by 1
Another solution:
Inbox feature. Most game have inbox feature where they send all deals and announcements of the game there.
Another solution
1 pop up got all the deals and announcements and u can swipe left or right to see the rest of the announcements

I too agree that this is annoying, but if it was in an inbox, most players wouldn't bother opening the inbox and might miss out on important stuff. Although I do quite like the idea of the swipe left/right for all announcements, that sounds like it would be good.