How about this?
Here is a comprehensive list of what we are offering backers at launch and for the first year of updates.
1 - You will receive a Steam key or gog key in addition to an Epic store key, after the period of exclusivity. You can do what you like with these keys.
2 - The steam/gog key will be a special edition that includes at least 3 major DLC packs released in the first year. Backers who stick with Epic will get this DLC as it is released. Again, you can do what you like with these keys - selll them, use them or donate them.
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9 - The two stretch goals from the fig campaign - sea bases and underwater missions - will form the basis of the first 2 DLC packs. There will be at least 1 more major DLC pack during the launch year, plus a number of free updates for all players.
From this thread: