Is anyone doing well with low overhead Bum marketing?

It seems that PPC marketing clickbank products can require floating a considerable amount of cash, with low margins and a couple of month wait for return periods to pass, it would seem possible to have x10 your monthly profits tied up in adwords outlays.
Is anyone doing will with free marketing strageties, SEO strategies including articles, forum and comment posting. I like the ethical notion of soft selling from an SEO site, rather than the hard sell ppc landing page.

See original post by osvaldo107