The basic ads were fine. Now I get a 10-second video ad after every game, which means that 10 seconds out of every minute are given up to blaring ads for things of absolutely no interest to me.
Its Minesweeper aversion therapy. It has worked very well in that regard: uninstalling.
UnrepentantHarlequin about Minesweeper Classic (Mines) ~ Retro Premium Deluxe Legend Puzzle Game, v1.4