Is the sample free?
Yes. Seeing your sample costs nothing, and nobody asks for payment to look at it.
Yes. Your first sample is free. You are not asked for a card, and you are not charged for making the sample or for looking at it.
What the sample is
A sample is a cover and one chapter of your book, made from the answers and photos you gave. It shows the style, the writing and the pictures you can expect.
If you want another sample
Your account has one free sample. When you complete an order, or buy a book, you unlock another free sample. The page tells you when your free sample is available.
Changes to your sample
You can ask for a revision of the sample. The sample page shows how many revisions you have left.