They would also seem not to be accepting any new subscribers. This is probably the best option for sites with lots of traffic. This is the minimum amount of impressions that your site must get per month in order to qualify for this program. I don't believe in this kind of payment plan, since it is quite rare that someone will actually click on an ad, and then sign up for the service on top of that. You get to pick what ads you want to host on your site.
Payment varies greatly depending on what the sponsor is willing to pay.
I don't like Safe Audit very much because if one of the company's ends its campaign before you are mailed a check, you don't get paid. Setting up the is also a lot of trouble since you have to copy the actual ad to your web server and set up a different html code for every single ad that you want to host. Hopefully, with my recommendations, you will find a sponsor that suits your traffic level as well as your needs, and will allow you to expand your web site and conquer the digital highway.