The banner is a little experiment on highlighting a post without making it a sticky. I think it works, but I don’t plan to make that a general ad space… There are some costs and I might look at ways to cover them later but I want to avoid ads. I’ll probably just ask for some donations, see how that goes.
Regarding finding devs, use the Projects category, create a new topic where you describe your amazing project and say that you are looking for developers! Do we need a specific category for it? I’m not sure. Post here and see what others think.