The bottom-line instinct might be to always push opportunities out to the community in search of customers, partners, employees and so on. But opportunities might work just as well as a way of asking questions or seeking help with business challenges. That's not unlike how someone might tweet a business-related question, or post it in a relevant LinkedIn Group, or ask it on Quora. But Skype has the added benefit of being able to connect people directly via video and voice. That removes a degree of anonymity, lets you see and hear who is answering your question, and adds more humanity to the process. Questions are natural conversation starters.