How to tell whether a book marketing offer is worth paying for

Start with the audience. If the offer cannot name the readers, the channel, and the likely action, it is not a serious offer yet.

Then look at the asset. Are you buying a one-time post, a review, an email blast, or a placement that keeps working after the campaign ends? Those are different products with different value.

Finally, ask what proof exists. Real numbers, examples, and clear limits beat big promises every time.