I think it is just there right now to act as a way to have friends compete with each other. I personally do not think there will be rewards because there are already two ways to get rewards in MineVast and in my opinion, three is overkill. You can get rewards through doing /vote and voting for the server, or do /reward and watch an advertisement to get a special chest. You can get various prizes from them like gems, banners, hats, enderpearls, and Admin/Owner heads.
Hope this helped!
