The creator was ex-Zynga, so of course it's largely built around a whale-first monetization strategy. Even more dangerously, it's inside of a game that appears to be largely vaporware, and has no high-profile company to give weight to the virtual items. At least you know Blizzard or Epic will be around for a while, these people could be bankrupt tomorrow and all you'd own is a worthless (and expensive) Ethereum transaction.
I'd also bet that this "sale" is an inside job, given that the virtual nonsense was purchased by another scammy blockchain gaming company via "Polyient Games Unity Tokens", and the $800K is based on the market cap of some obscure, illiquid token.