I for the life of me don't understand how that game got so popular. I remember early on people were making good money off breeding and selling kitties. Last I had been aware that game had kind of died out because Ethereum transactions got bogged down and expensive and it wasn't really worth the transaction fees to play. Furthermore the whole concept to me was just kinda dumb. A parody game called cryptotitties came out shortly after, same concept just with boobs instead of kitties. I think it got popular because it was the first dApp out there and because crypto was incredibly hot at the time. I've been kind of out of the crypto space for the past 6 or 8 months but I would think the popularity of that game has died off