Etsy doesn't allow listings to have a inventory quantities 0 or below so we deactivate your listings to prevent them from being oversold. Trunk is smart enough to re-activate them when their quantities go above 0 but will not do so if you had originally deactivated them.
Trunk will also renew your listings if they were originally sold out but now need to be put back into stock. Etsy charges may apply here but we're going to assume here that this is preferable over not having it in stock. Let us know if you'd finer control over this.