What is an intoplane fee?

Could you please clarify for me what exactly an intoplane fee is? I'm familiar with various transaction fees in the world of cryptocurrency and finance, but this term is new to me. Is it a specific type of fee charged by a certain platform or exchange? Or is it a more general term used to describe a certain kind of cost associated with a transaction or process? I'd appreciate any additional information or context you can provide to help me understand this term better.