The Plugin Simple Aweber Optin Widget comes under two types of licenses:
1) Personal Use Only
You can use the plugin on your personal sites only. You are not allowed to use this plugin on your clients’ sites.
2) Unlimited Sites
With Unlimited Sites License, you can use this plugin on unlimited sites of yours and your clients. You can not sell the plugin to other people though.
For any kind of support, please submit a support ticket at our help desk. https://theweb-designs.com/support