Generally, those sort of responses are given to people who didn't pay or contribute in any way, and want something for nothing. OSS developers don't work for you; they're generally solving problems that they're having, and if you happen to be having the same problems, then they may get attention. If you'd like some piece of open source software changed, you are free to change it or to hire someone to change it; that's the deal. Expecting work for nothing is ridiculous.