We've already announced that:

"Once we've done both things, we'll give you settlers and raiders a chance to figure out the price of Stardust for yourself. Stardust may be converted and traded as Steem Engine tokens. You may transfer it into or out of the game."

Source: https://steemit.com/nextcolony/@nextcolony/removing-stardust-bonus-in-shop

Thanks, @cryptorg! (: