There's nothing especially cogent about this post on the real heist in MacHeist, except that it is the latest in what tells me daringfireball is likely the best Mac developer blog out there:

Consider this: How much worse for one of these developers [getting a flat fee from MacHeist for the right to sell their software for a week] would it be for you to pirate a copy of their app than to obtain a legitimate license through this bundle? They don’t get any extra money either way, because they’re getting the same flat payment from MacHeist whether you buy the bundle or not. And if you do buy the bundle, they’re on the hook for providing you with technical support.