This is something a lot of people were asking about. Before you could only drip modules (pages), now you can actually drip a whole course. Which is cool because you can sell a course for $900 and then use a community as a payment plan (in this case it would be $300).
The only problem I see is asking them manually to cancel after the third month... But it's also a benefit, because then we could upsell them to another month, or downsell them to a lower tier community.