If your site gets most of its traffic from Paid Search, you should ask yourself the same kinds of questions. Is this because you have decided to use aggressive advertising to give your business a nice big push? Is the paid search bringing in plenty of sales for your healthy website? If so, that’s great; this strategy can be seen with some large successful companies. If it’s because you are unsuccessful with organic search so you’re doing paid search instead, you’d probably get a good return on investment if you optimize your website. Typically, the Paid Search results stay about the same, but the Organic Search increases and so do sales.
Cheers for sharing that thread, I'd not read it. I think most of the confusion here arises because of how standard GA reports work on a last non-direct click basis - if there's a previous campaign within timeout, that user will be attributed to that campaign, even if they're technically returning via direct. MCF reports are the exception, of course, given that they show *actual* direct.
Beyond organic and direct traffic, you must understand the difference between all of your traffic sources and how traffic is classified. Most web analytics platforms, like Google Analytics, utilize an algorithm and flow chart based on the referring website or parameters set within the URL that determine the source of traffic. Here is a breakdown of all sources: