Give us link to your site... If your buying popunders/skimmed traffic you need really good landing pages (loads of good images) otherwise ppl usually just close it.
Also, what is your bounce rate?
Regarding plug rush, you should also check the traffic because they might have quite loads of bot traffic and they need to make white list for you (atleast that's what they told me).
I'm using
Avatraffic right now and proves quite good (skimmed traffic).
Anyhow... if you want to have any real results you need to buy more traffic. Atleast 10k. 1k doesn't mean much.