Principal Issues: Based on the hypothetical facts provided, whether suppliers who provide digital content to a digital interface are "users" of the digital interface and whether that digital interface is an "online marketplace".
Position: Yes, the suppliers are users of the digital interface and the digital interface is an online marketplace in the context of the hypothetical facts.
Reasons: Based on the text of the "online marketplace" and "user" definitions, the meaning of “interact” and the policy intent of the "online marketplace" definition, the suppliers interact with the digital interface as well as with other users of the digital interface.