Yep, drop-shipping is about buying and selling traffic mostly. Get visitors and sales paying cheap adds so that the cost of bringing the client is lower than you commission.
There are obvious caveats on this business model (e.g. most likely you will burn any reputation, as producers do not have any attachment or deal with you on the quality of the products, etc...)
Don't mind the late reply, just noticed yours recently.
I agree, you still have to cough up your own expenses for exposure. I always see bloggers or those finance gurus advocating affiliate marketing/ drop shipping like there's no tomorrow but there's so many things to factor in, such as what things you're trying to market, where to promote and why people should buy from you instead of the competitor or the suppliers themselves.
And for the quality, that's the issue. Unless there's a solid relationship, you can't test out and write some honest review. Kinda blows.