I think that if someone comes up with a solution they should be able to sell it if they want. Not everything is free in this world. However, if you came across a file for free and have it, I don't think you should charge for it.
I have learned that most of the flashing isn't always about knowledge, it is more about having the file that is going to allow you to do what you want. And that is the value of these solutions.
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