You may have discovered this by now, but based on other reviews I've viewed, by rethreading the strap so that it wraps around the outside you can create a cash strap. The brilliance of the design is that you can choose either option with no difference in thicknesses.
I love my 8oz bill fold. It is big and easy to open. It's hard to get out of my pocket so I should not lose it. Lots of storage for credit cards and receipts and other stuff.
Great review, but I've only had bad luck on Indiegogo, 1 product never fulfilled backers orders but sold their product on Amazon. IndieGoGo did nothing. The others just did not live up to the hype, I'm actually ok with that. Being part of the first draft, you got to expect bugs, but being totally scammed is unforgivable. This might be a fantastic product, but I vowed never to do business with Indiegogo ever again.