Without examining internal Amazon or Apple data on the marginal sales increase estimates for Siri/Alexa it's impossible to say, though.
Apple has earned a lot of money on devices with Siri included. Microsoft has made a lot of money on OSes with Minesweeper included.
It would be wrong to conclude anything about the profitability of Minesweeper based on that fact, just as it is wrong to conclude anything about the profitability of Siri based on the equivalent fact from Apple.