I offer Phone WL. The benefit is that buyers do not need to be online to make money, they just answer their phone.
70% first time sign-up and a 50% recurring commission for the lifetime of the sale.
And how do I know it will work? Because phone sex operators that work on company sites keep a fraction of the actual sale. So they are always trying to get the customer to pay some other way.
So my system lets them pay a small fee to have their own site and get paid instantly. Plus it can be used for anything (not just adult). In fact I'm hoping to build most of my core members as mainstream. I have several that simply offer non-judgmental advice and they make money. Then there are ways that people with knowledge in a certain area can use their knowledge to make money. Webmasters, successful affiliates, developers, etc.
It can even be used for popular girls as a fan site. If you have solo sites you could offer it to your models as an incentive to keep them active.
Anyway if you want to check it out the main site is at:
https://paypercallplugin.com
The instant setup is at:
Pay Per Call Website – Start Your Own Pay Per Call Website Today!
Once a user has setup their site (the process is free), then they can upgrade for a one-time fee of $49.95. After that it's $19.95/month for maintenance, on-going upgrades, etc.
I'm in the process of adding texting next.