"You bought the secret." Is the reason I most often see as an objection to returning a magic product after you have bought it. The idea being that the information you may have got from it is trapped within your head for ever. But what if the secret is the gimmick then what. It's not like they send plans on how to make the gimmick yourself (I am aware that some do, usually those require you to make it yourself from scratch). But let's take an example from my own list of reviews, Blackmail by Bobby Motta. Blackmail for those that did not read the review, is a utility gimmick for mentalism. It's basically a new spin on an old classic and the secret lies 100% with the gimmick, there is a bit that may be all Bobby but without the gimmick that info is useless. Now several times they mention how much trouble they went through to find just the right materials, but they carefully avoid saying anything definitive which ones they used. At one point Peter McKinnon is about to say what weight the card stock is but he stops just before and switches his train of thought. Maybe he just forgot or maybe they want to keep it a secret. What this means is you either have to buy their replacements (which are always out of stock when I check and I'm willing to bet don't come with card-stock) or source all the parts yourself. Setting aside most of that BS I find that super annoying because as I said in my review they don't give you enough card-stock I found the card-stock supplied to be totally un-reusable, by their own math you would need at least 120 pieces of card-stock to use up all six gimmicks supplied. They gave me five, not even enough to practice with. I ordered Blackmail the day it was released and by the time it got to me there was no refill option on the Ellusionist website yet. So I had to devise my own solution to the card-stock issue, it's a serviceable solution but not one I would want to use in a professional setting. I would have had an easier time if they had just told me what weight card-stock it was. Even if they told me exactly what type and where to get all the pieces I'd still prefer to just give my money to them in exchange for a well made gimmick.
So did I buy the secret (which is not much of one as it's almost right out of 13 steps) or did I buy some gimmicks and if it's the latter and I choose not to use them after I view the video is there a good reason for me not to return the whole thing. If the gimmick does all the heavy lifting in an effect and I choose not to use that gimmick I feel there is no reason not to return it. But beyond that when I purchase some effect I feel that the creator owes me all the secrets that go along with it that he has the right to share and sources of all the one's he's not so I can go after them. I don't think it's greedy, I bought it, I paid good money to be able to do that effect, and I need that info to properly utilized the effect. Anything less and I've not really bought the secret just an idea I have to figure out myself.