I've already seen hundreds of similar projects. It seems to me that Gamelife wont succeed.
All the projects you mention are centralized, its unlikely that they will be really interesting for the users.
Maybe, but I still dont understand how Gamelife will use decentralization and smart contracts.
Smart contracts replace the sale intermediaries, decentralization allows to make deals directly, avoiding huge commissions which are a common thing for centralized platforms.
But centralized projects sometimes dont have sale intermediaries, too, so I cant say that this is n incredible advantage.