Your earnings depend on the subscription the customer chooses. It could be more than 0.33 or less. Based on an explanation I got years ago, except there are changes, your royalty also depends on if your files were purchased directly from Adobe or from Partners.
The license fee that you earn is dependent on the Stock subscription utilized by the Buyer. Click in the "Royalties" link at the bottom of your Contributor page to understand how your royalty payments are determined.