I'm seeing a lot of traction of this store in the Nostr community and would also be interested in a more independent assessment by the GrapheneOS community.
There seems to be a new website. The concept, or I guess genesis, behind the store is nicely explained on their blog, originally on Stacker News. The idea of a web of trust, a social approach to trust, I find fascinating. The possibility of direct payments and a direct relationship between developers and users are super cool and to me go back to what the Internet once aspired to be. Basing all of this on Nostr, Lightning, and Bitcoin seems like a good fit.
But beyond regurgitating their ideas, I am in no position to really assess the thing itself, the store. Could somebody more knowledgeable chime in?