Originally Posted by jakewastaken
I never would have spent money on without trying it.
I think this is a key issue with any data in the furthest sense. You cannot be certain of its quality unless you have already paid for it to get it. Thats a good reason why publishers exist after all. If some well known publisher accepts a book, you can at least be quite confident to have some quality... And the higher the costs are the higher your quality confidence needs to be.