Yes, many people will not even bother sparking them.
Still, most people would know what it does and decide "Hah, advertisements, I'm not clicking those".
It's still advertisements of other saves, so people will still think "Oh, just another safe, skip, go search more".
That does dictate usefulness, also, I do know by experience that people do not generally click advertisements from a website that I run, whether it's advertising another part of my website or an ad. They generally don't click it.