

If you are releasing regularly - MWF, or every Sunday a monthly subscription works well. However if you are the type that makes good content but can’t release often you want pay per episode. If you sometimes release twice a month, and sometimes go months between a release it isn’t fair to ask your viewers to subscribe in months where they get nothing.
They probably have a good cease and desist on Broadcomm for automatically installing updates on their system against the contract.