You beat me to it! I thought it was hilarious when I found them for the first time in my gamecube AC. Although I don't like gyroids in general nearly as much as I did in gamecube. Maybe it was the novelty that's worn off long since then. They just take up space now and I'm not good at arranging them in pleasing ways. :|
I used to love them a lot, using them to make music sound better. Now they just look so unfitting to be in any house, so I sell them when I dig them up.