An idea about how one site can provides ads for other UNA sites.
Ok so, I have another dreamed up thing here but it makes sense, it might be tried sometime.
I had this thought about a way to provide advertising on UNA platforms, which involved one site using an ad server, which will run ads on other sites. The owner of the ad server site runs ads on the UNA platform and allows newly create sites to obtain the ad zone iframe scripts to run in their site.
Cookies track what urls, the ads impressions are being counted from, as well as the clicked-on ads. And hence, profit sharing can be done this way. I figure that this is one way that a UNA site can help other UNA sites, and help pay their hosting cost etc. If they come to make enough, they could commit some money to advertising and promotion of their site to increase its membership.
I was looking at the UNA Banner Ads app and I believe it can do a good job of advertising the same as any good ad server. It seemed to me it had several ad zones in the demo. However, for site-to-site ad server use, you would need to install a WordPress directory and get the Ad Server plugin, with the Sales plugin.