When I put more than one ad unit on a page, the ads (or at least two of them) are repeated. That very bad, because then effect having two ad units is cancelled
YPN doesn't support multiple ad units. You are allowed to put more than one ad unit on a page, but there will likely be duplication.
I just called YPN support about this and they told me that you are only allowed to have one ad unit per page. Reading the terms and conditions (section 4. Implementation) very carefully I guess it does say that: That seems like a severe limitation, which I'm hoping will change soon.
You are dead wrong, that section deals with a limitation of 250 or so queries per second. I just called, (866) 785-2636. YPN Help line, unlimited number of ad units which will change once out of beta to 4 or 5. Call for yourself, they pick the phone up immediatly, no hold time.
Hmmm, strange. I did call about an hour ago and they told me I can only have one ad per page. It seems like YPN needs to get their story straight on this one. No offense but for now I'll belive what I heard from YPN, not what you told me you heard I also sent filled out an online request form for an "Enhancement Request" to allow multiple ads per page. I'll see how they respond to that. The TnC to me pretty clearly spells out only one "query" per page. The 250 queries per second is just a sub clause. It says "a Query each time that a user navigates to an Ad Page", not "mutliple Queries each time that a user navigates to an Ad Page".
I wrote to YPN and got their confirmed reply on this topic However, I have wrote them back saying its under utilization of ad space available on site pages and other ad programs (adsense) allows more than one ad units. Lets see what they have to say
Hmmm, interesting, I was told something different, but I asked my contacts, I didn't go through the regular support channels. It is worth noting that AdSense didn't support multiple ad units until over a year after they launched - before September 2004 it was against the terms to show multiple ad units. How times have changed