(written by BirdOPrey5)
I released a BB Code on vbulletin.org to allow admins (or even members) to place an ad sense ad unit in their signatures.
Obviously you must obey Google’s limits on the number of ads per page so I only use it in conjunction with a mod that limits 1 signature per user per page.
I find it an interesting location, a little more random then always after the first post or such.
I think this is a rare case however it could get you into trouble.
There is a much better way for you to display ads, check my Adsense placement threads for example.
And if you want to create a revenue sharing forum there are Mods for this purpose too ;)
admin
Only 3 blocks will display at once.
What adsense is trying to avoid by specifying that only 3 adsense blocks are allowed on any one page, in my opinion, is the use of iframes in order to overcome the limitation embedded in javascript.
Do you really think adsense would punish your site or your account for having more javascript codes on your page than the 3?
As I said I don't think so. With 10 javascript codes, only the 3 first in the html code will display, the other will be blank.
But anyway, everything can be solved by coding, so if we really wanted to have only 3 javascript codes, it would be possible to code it at the level of the vbulletin plugin. I don't know anything about vbulletin coding, but it's not that hard a task when you know the inner workings and coding practises on that platform.
It is always better to ask then to guess.