What skills would you be contributing?
From my hobbyist job posting I already have a modeler and animator interested in my project as a spare time kind of thing. I guess an engine may be the hard part alteast if I want decent graphics. I really need a programmer. I have some minor programming experience but I specialize in project management. So i can manage a team really well but I need one first =/.
The problem is that this sounds an awful lot like "I want a team to make my idea for me", which no one wants to do, either for free, or promises of a reward. The other way to do this is to pay a team to do it, but you don't have the money either.
(Project management is certainly useful, but personally I'd expect such a person to have skills/experience in at least one of the areas he is wanting to manage, especially if you want to attract people to work for you.)
I am contributing several things.
1. I have a idea and a concept and can design a number of the levels using my ideas not to mention many mechanics. I have several feature ideas.
2. I have some programming experience
3. I have project management experience to help manage the team.
4. I'm a professional writer with 8+ years of experience reviewing and writing video game reviews. I know what makes games good and what to avoid in games.
But I will say so far so good. I have a programmer, modeler, and animator all working on the project now. As purely a hobbyist project this will probably take several years to complete as I don't expect any of them to dedicate large amounts of time on the project for no pay. The best part is the programmer made his own engine so we are going to look into using his engine for the project.