should i invest?

im currently advertising with bidvertiser for my site(sig) at 5 cents per click on selected sites, which is in the computers and the internet category for keywords like software, the internet, computers,blogging,is this good?? should i invest more on it?
by the way serps are finally kickin in though the progress is slow so should i depend on the free traffic or invest on advertising at 5cents per click?

See original post by Luq