Has anyone gotten involved heavily in display advertising or re-targeting. I know there are several companies out there that offer these services. In my opinion one obstacle is the fact that no-one seems to tell you all the places you are advertising on. They only give you a few sites they use and then tell you that you will be in a network of 50 to 100 sites. (These could be garbage sites) Ad spend in newspaper is on the steady decline and if done correctly I think display advertising may be of benefit in some markets. I have only dipped a little into this arena and I'm not real interested in throwing money away so it would be nice to get everyone's perspective on this.