I do not own Don’t Starve on Steam. How does the Frontier pack work for me?
If you do not own Don’t Starve on Steam, the Frontier pack is $19.99 and includes 1 copy of Don’t Starve and Don’t Starve Together for yourself and a copy of Don’t Starve Together for a friend. The friend copy of Don’t Starve Together comes as a tradeable item in your Steam Inventory. If you purchased the game on gog.com, contact support and we will help you out.
I take that as good news but maybe I misunderstood it?
The only thing it means is they will give you a key for DST (and DS too I think). Also their boss said recently that you can use standalone key on Steam, I'm not sure wether it's true or not. Wether that's good news or not... I'm not going to comment.
Last thing I heard from one of the devs is that they will still look into making it standalone, but it's not on their priority list since they're busy with DST development itself. Their PRs are way more dismissive tho, so I wouldn't keep my hopes high.