"PPC (Pay Per Click) is declining for the most part as a venue for ad-sharing. The advertising industry is trending towards "Impressions". That means how many of my ads are being displayed by your company on its' pages. The normal count of impressions before there is any revenue sharing is 100,000 impressions. So it really doesn't matter how many eyeballs see the ad or clicks are made to an ad.

Here is a recap of why private sites may not be offered or supported further into the future as presented in threads and notices on this wiki.

1. The Ad suppliers say "THEY" do not want their ads on a private site where they cannot see them.
2. The amount of resources it took to test and roll out new features on private sites was twice that of public sites.
3. Wetpaint had to streamline its operation and again the first trimmings one will see in any organzation when trimming is necessary is man-power. Wetpaint lost 27 percent of its workforce. Next, a company will look towards trimming offers that are not aligned to the mainstream operation. Wetpaint is an ad-supported operation.

I am only trying to present facts here and not offer an opinion. Please view this information as such.
See reply number 8 for a more detailed explanation.
"

"I think what he meant to say was that there is already a thread on the private site invitation issue here:
http://www.wetpaintcentral.com/thread/3303758/Invites+and+Private+Sites+-+not+working

Things get a little crazy when we have multiple threads on the same topic running at the same time."