Create different price model
The coin system is gimmicky. The original model for early adopters was better. A different pricing model would bring more credibility to the site.
I've always ended up with extra in game currency in other games. What advantage does it provide customers over a simple pricing model like the early adopter packs? I just found this site a week ago and was going to purchase founders pack. It was a simpler model and gave me confidence I could buy a bundle to support you and get future content. Coins are more complex and doesn't provide value to customers. It makes purchases a two step process. Bundles and/or discounts on > $x is simpler.