Help me block a set of ads

Just can't figure out how on the Adsense Block section

[explorador]

Hi webmasters, so this was easy right? can't figure this out. There is a set of ads running on a lot of my pages (related to low inventory), so there is this company with a set of diff domains selling related stuff. Goes around a bit like this:

The best trips to mars
monkeyspace . com
The cheapest way to travel to mars

The best trips to Jupiter
spacecow . com
The lowest prices on the solar system

Travel to Neptune
rat-space . com / offers
Enjoy your stay outside earth

Something like that. The thing is I try to locate the ads on the blocking section using the title... no luck. Using the domain? no luck. Using the keywords? no luck, nothing found. I got the link on the ad and check for a domain there, tried searching that domain and no luck so far. It's a whole set of ads but can't locate them on the ad center to block them. Yes it's adsense, and no, no hacked account or website/html etc.

Any help will be appreciated.

[NickMNS]

The problem:
Even if you are successful at blocking this spam, what happens is that it is replaced with more spam. This is an auction, the highest bid wins the placement, remove that bidder you get the next best bidder. The next best is by definition worse. So really this is an exercise in futility. Not to mention the fact that these ads run for different domains and accounts.

The solution:
You the ad-balancer, the ad-balancer will remove the lowest paying ads and not replace them. It eliminates the inventory thus reducing supply at the same time a reducing the demand. The result is that prices are maintained. Or stated in the context described above, the lowest paying are not replace with the even lower paying ads. For this to be effective it assumes that the ads in question are truly picking up the residual low paying inventory. But even if the assumption doesn't hold, eliminating that inventory will reduce the total number of ads making easier to find the spammy ones. It may still be like looking for a needle in a haystack, but the stack will be much smaller.

Yes much smaller, because (at least in my experience) high paying ads tend to re-appear frequently ie: many impressions for a single ad creative, whereas the low paying ads tend to appear for only a few impressions. Assuming you have 1000 impression, the top paying ad may appear for 200 to 300 impressions, whereas the lowest paying impressions will come from something like 200 to 300 ads. So if you block the bottom 20% you end blocking 200 ads. That is 200 fewer ads to review.

[explorador]

Thanks Nick for the explanation.