We charge a flat 50% fee from Regular strategies and 40% from Trades-Own-Strategy (TOS) strategies for any subscriptions you collect through Collective2, but only if and when you collect subscription fees. This fee includes our credit card costs.
If and when we process any refunds for your subscribers, there is also a small fee to cover the credit card costs of the refund transaction, as per the terms of service: https://collective2.com/terms-of-service