What is an apsn fee?

Excuse me, could you please clarify what an "apsn fee" is? I'm not familiar with this term in the context of cryptocurrency or finance. Is it a specific type of fee associated with a particular platform, service, or transaction? If so, could you provide more details about the nature of this fee and what it's typically used for? Additionally, is it a one-time fee or a recurring charge? Any information you can provide would be greatly appreciated.