Clean script, not sure those ads are needed though! In my experience, I did not earn much with a-ads. I hope you do if you decide to keep them though. They pay only per unique impression, but by unique I mean they only credit an impression if that user's IP did not see an a-ads advertisement for at least 24 hours. Also, feel free to add
Coins4Days to your list. We have been around for a few months now. Best of luck with your site!