One mistake I often used to make at Justin.tv was offering a potpourri of business models (virtual goods, product placement, chat ads, contests, etc..). I was embarrassed to say Justin.tv would monetize with advertising when clearly that was the only answer. Own the simple business model.
We earn trust by stating our business model upfront – instead of ads, we monetize by charging directly. Directly charging creates high expectations from our members, and in aspiring to meet those expectations, we are held accountable to creating something you love and use.