I notice that the "Get paid to blog" ad from Soul Cast disappeared these days. I wonder if any here also notice the issue. I think they are either thinking AdWords isn't worth to them (due to their large investment as they pay as much as $0.07 per click which is quite high in terms of the keyword "blog") OR they ran out of budget as their high position in the keyword "blog" (which almost shows up in every single blog) drive them too much traffic and they have to cash in more to their AdWords account ....
hmmm never really paid much attention, im thinking they probably think adwords isnt worth to them as much
It could be that you just aren't getting their ads shown anymore for some reason. Sometimes teargetting goes a bit haywire on some pages.