Yes, in Windows 8 / 8.1 Solitaire (as well as other casual games published by Microsoft, such as Minesweeper, Sudoku, etc.) did include ads. They were shown in

Yes, in Windows 8 / 8.1 Solitaire (as well as other casual games published by Microsoft, such as Minesweeper, Sudoku, etc.) did include ads. They were shown in small boxes on the start screen, if you swipe to the right, and in the end game "you win" screen. In addition to those, I occasionally saw a full-screen ad when starting a session on the PC, but not on the tablet.