Hi Greg,
According to 10. Term and Termination, in case of termination or expiration of this Agreement, Licensee must immediately cease use of and/or destroy all copies of the Trial Software in its possession, if any.
Practically this means that you have to terminate your instance together with all back-ups if you have such..
The first SAP CAL subscription was signed a few months after we released the first trial. Since then the number of subscriptions keeps growing. The rate that you asked for is confidential information..
Best regards,
Stanimir