looks like the mods on our reddit post checked out the claims on the chrome updater and they have not found any such things.
3DSphere
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yes its like the silver. when you get a certain amount of bronze you start earning silver. once you get enough silver you can start earning gold. We are looking into just hiding the tabs till you can exchange so it isnt confusing on why you can't get silver or gold. Also next update will include descriptions on things so you don't have to guess.