Indeed, a tightrope.
It's a very controversial subject, and whichever way we go, some people will be angry.
Regardless, the stuff that we've deemed exclusive for our early supporters should be exclusive, at least for a duration (if we make it available for newer players).
Also, not sure if everyone realizes this, but the first version of GRIP on Steam is exclusive to the early supporters on our site. The public version will be coming afterwards. So there are perks associated with supporting us early