What it really comes down to is this: Either a plugin developer wants to make a plugin or they want to get paid to make a plugin. If you make a request and the stars align and a developer wants to make that plugin then everything is just peachy, but far more likely is that no developer wants to make it for free. If no developer wants to program your idea but some developers are willing to do it for a price you can either pay the price, make it yourself, wait and hope someone does it later or give up. Complaining because nobody wants to work for you for free makes you look like an entitled child. The majority of plugins are free because the developer wanted to make the plugin and chose to give it away afterwards, nobody is sitting around going "Oh boy, I can't wait to brighten up someone's day by picking a plugin idea from a hat and programming it for someone else's benefit!"