I do think you're right with your guess, and I don't mind you putting this as an answer, but could you also look for a source perhaps? Anything that can help prove your sales or unpopular theory would be good.
I thought the games were cute, y'know? the attractions were fun too. it was kind of lame but they made me happy on the inside, and the music was good lol. I would reccomend if you haven't played them before