There’s a catch-22 involved in crowd-sourcing which I find frustrating. The buyer will not receive work that’s as high-quality as they could from working with a single designer (or firm) who really understands their business. And the designer spends time on semi-custom designs which may or may not be chosen, resulting in an overall loss of time and effort. The whole process seems designed to grind down both sides to middling results. Now I’m not saying that everyone needs to pay Chiat/Day prices for all their design work, but if you’re asking for custom spec work, you should pay the designer for their time. Otherwise, you’re just asking for  lots of random submissions with cookie-cutter solutions to your unique problems.