Hi bro, I want to use the Google recommendation thread thingy at the bottom of each thread. I run a forum too. It's impossible to get through to MJ DeMarco so I'm hoping you can be the middle man? Do you happen to know the name of this modification? Thanks.
If the ad is unrelated to the website, then it'll likely have a low Quality Score and you'll be charged a higher CPC for a lower (worse) ad position. The ad should still run.
I've run ads sending traffic to the Yellow Pages sometimes, just to get an ad up and running quickly and see it in situ.