Well, its a freaking article I'm writing for those newly open bloggers and site owners who are in that dump thing of introducing those large banners on their lose sites can make their pockets heavier. In that case they are quite wrong because the life is complex and we should know that.
Watch the movie "The social network" always reminds me of introducing advertistment, and that's the reason my blog doesn't have ads from a long time, but it doesn't mean I will never put some but not right now. The thing is the ads destroy your site like you've invited some friends in party and party is going to be over at 12 O clock - from Social network movie.
I'd read some articles on MOZ blog and some others of what is going on in Google's update. I found that sites with lower UX doesn't get Google friendly and remember that:
So make the design and you content for people because people are their who are interested in you content rater than those ads.