Volley had added more features. You can offer one-time or recurring charges and your visitor installs volley and their time starts to countdown. It's pretty cool. For me, I have people who want to "pick my brain" or if they would like to retain you and have you in their pocket it does that as well.
They still have a free version if you'd like to take it for a spin.
You can also now charge for your memberships. This again is either one-time or recurring. They take 5% which is less than Patreon and other resources.
I'm currently using Volley for time-shifted coaching at the School of Podcasting. Now I'm going to try it and sell a membership (called Spaces in Volley). It integrates with Stripe for credit card processing.
Right now on the sales page, you have to have a volley account, and then return to purchase the membership. I wish this was a little more automated. Once you sign up for Volley , it doesn't really point you back to your sales page.
I'll keep you posted.
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