When not to use CPC ? (on what kind of sites) ?

I am a newbie in PPC market and curious to know on what kind of sites does PPC doen'st work or work badly. Does it work for proxy sites ? Does it work for games sites ?

 

If you have some way to monetize the clicks that come through and at least break even it will provide the value of more traffic. If you can make money from it (which is most peoples objective), even better.

 

The only problem with proxy sites is that it might prove difficult to breakeven even if you do stick with cheap keywords.

 

for proxy sites I would definitely say no, sorry