How is your product licensed? Is it per e-book/website or is it priced by the number of users?
Each purchase provides you with a Single-User license.
You can make unlimited flipping book on your one website when you buy Personal License. In other words, you are able to use myPF for unlimited publications in one website (1 domain name or subdomain) with Personal Licenses. You can use unlimited myPF in up to ten websites (10 domain names or subdomians) with Professional Licenses and in up to fifty websites (50 domain names or subdomians) with Enterprise License.