Staking was a benefit offered to holders in the early days (December of last year) and has now ended.

Heroes obtained from the 2nd pre-sale do not receive staking benefits, but their prices have been adjusted to be reasonable. (360→250BUSD)
And the 2nd pre-sale hero will receive direct GRT airdrops when the game is released. That means it won’t be long before the game’s release, and the 2nd pre-sale hero provides a clear benefit to getting the game ready in advance.