Re:Oy. (Score 3, Interesting)

Searching from within Europe, one of the worst perpetrators for this is kelkoo, which offers price comparisons for an item, between different sites (and it usually does have prices which are amongst the cheapest, so can be useful). However Kelkoo will regularly appear in the first ten listings, often several times- then as you say, have no actual links to the product you are looking for, therefore in this case you cant buy it from a partner anyway!! A total waste of everyones time.