Tools like this one is what makes the NFT market so attractive: the Blockchain, due its public nature, allows everyone to create tools and appliances that makes life's easier.
This could never exist in a traditional game in which only the Game Devs have access to the information about the players and the in-game market.
I agree with everything that you said, @luizeba. I love that there are a lot of tools available for players to utilize, without the creators of those tools having to pay a hefty sum just to gain access to their needed data.
Usually, not even by paying one would be able to access those informations. Games barely have some broken APIs that allow some data harvesting, but that's it. Blizzard or EA Games isn't selling the information from their players to anyone, as they're monetizing this data.