If I pay USD$10 (ignoring sale and rounding up) I can play 1 episode further than the "free version" from another site (unnamed) or for between USD$5 and USD$6 I can join your Patreon for a "month" download episode 4 the cancel my Patreon subscription?
Let me ask you a silly question: Why would I pay more for a lesser version of a product? I mean ignoring the fees you pay for the service of a site selling your product or selling a subscription to your future products look at what you are asking people to pay for a single download vs. a monthly payout which can be payed once and cancelled. Would you pay 2 times the price to get an inferior product?