There is three kinds of audiences:
1. Your "neighbors" in the Treasure - they may notice your item and favorite it and that way they'r followers will be able to do the same.
1.2 The same neighbors may notice an item and buy your item (I have a large number of sales goes to the sellers on Etsy, and among them even jewelry sellers)
2. Treasure that have been lucky enough to gets on the Front page. And then during the magic hour an item will be visible to everyone who comes to Etsy.
3. Treasure promoted to the first page. Potential buyers come to the front page and was impressed by the beauty of it clicks on a link leading to all other Treasuries, and then walking up to the first Treasuries he can see your item and buy it.
And here is my latest Treasury: