Different types of subscription

I’m interesed in joining Zwift, but becasue of my random work schedule, it’s a waste of money. Most times, I would not get value for money after paying for a month and cancelling. My days off are random, and not regular. I grab my chances where I can to ride my bike. I’m wondering if there might be some interest for people such as myself in purchasing something more like a 10 trip/session ticket like you can do to catch the tram! Or 20 rides/session, or whatever. This would be the difference of me joing Zwift or not. Currently, it’s off limits to me as it’s just not value for money, and I don’t have enogh money to throw it away for something I’m unable to get good usage out of. Thanks