Free profiles never expire.
You save 10% off the renewal price when you auto-renew Featured and Basic profile, which are set up to auto-renew by default.
To edit your renewal status at any time, simply navigate to your My Vendor Listings page and click View/edit in the Advertising Settings column for the desired category.
If you click on the current renewal status, you'll see these options:
When you are set up to auto-renew, your status displays as:
When you are not set up to auto-renew, your status displays as: