Pay Per Play Ads
I have seen a lot of talk lately about Pay Per Play ads. PPP are ads that plays a 5 second audio ad automatically to every visitor who visits you site. I guess the company is offering a pretty aggressive referral program, because everybody seems to be pushing them lately.
I personally would not sign up for the network. I find the ads very annoying and would never subject my visitors to this annoyance. But I guess if you had a site where you didn’t care about return visitors, they might be OK.