I think the need of waiting for another platform to be funded will be dependent on the nuances of making a trainer for this particular game. Often times trainers intended for one platform work just fine on others, like the Witcher 3 trainer working for Steam, GOG and Origin. That won't necessarily be the case here, but it could be.
It will be on steam as well so you know.
This doesn't typically matter; they almost always do Steam first because it's the most used. I pre-ordered on GOG knowing this would be the case.
Thanks All for the generosity to the CH Team and PWizard! We appreciate it!