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#7 Freshness
This is really an instance of #1 but bears special attention cause its so fuckin Fresh. You are going to have:

Repeat Customers that would fancy spicing things up.

Lurkers who come back and are won over at last.

These 2 types of customers are basically your entire audience once you are up and running. If they see something new every time they come back into the store they will come back just for this reason and you are set sister.