Good question!

The Pre-Sale phase aims to build the initial reward pool. But what will happen after the Pre-Sale? The stable reward pool will be largely ensured by the market (5% fee will go entirely to the pool), game store (60% of the item's value will go to the reward pool and 40% will be spent on developing the game) and potential investors.

Probably after the release there will be an option to delegate SP to the game account, so it will provide small but steady earnings - both for the player and the game reward pool. However, the option of delegation is not yet certain - it all depends on whether we find a way not to abuse power and at the same time make the whole thing profitable.