How do you spell "no business plan"? Advertising!
I'm fed up with all those companies, business models and naive entrepreneurs who just don't have a clue about how to make money with their product, and try to explain to you that advertising will be the solution, "because, you know, advertisers will d-i-e to reach our audience in such a super fine targeted way and will pay super premium price for that privilege".
I invite those advertising visionaries to spend a couple of weeks talking with some real advertisers and account managers in  media agencies about getting their commitment to a specific budget for the next quarter, just to get a glimpse of the real world and see how so different it is from what you can read in AdAge or some super edgy blog.