If you sell PDF user manuals online, one of the first questions you will have is this: Do I need to create one account for every customer, or can I let everyone use the same login? The answer depends on
[Solution] How Do You Prevent People from Sharing Your TOEFL learning PDF eBooks?
A Practical Guide for Authors, Trainers, and Publishers (Especially for PDF-Based Sales) If you sell educational content—such as a TOEFL preparation guide—or a professional “how-to” manual, you’ve likely faced this challenge: “Customers want a PDF version so they can take