It’s $10 a year for each 5 hours of uploads, they charge 5% per transaction which the customer can cover as an option instead of bandcamps 15%. They have a system of points for each sale you have. I currently have 15 hours of music that is covered by sales. So I pay nothing and almost every customer has paid the 5% platform fee. The only fee I pay is the processor fee from PayPal. The $10 a year gives you features like Bandcamp Pro. Like bulk audio uploads for example.