If I want to find a vertical search engine
I imagine I'll google for 'vertical search engine'
The last thing I want is one search engine pointing me to results on another search engine. If Google is pushing such nonsense down the results list, that's just good customer service.
If a vertical search engine wants hits, maybe it should find channels to advertise itself directly to folks operating in that vertical - I suggest Google adwords, I hear it can be pretty effective at targetting, and you get your results showing right alongside ... ...
Wanting your competitor to give you free advertising is just dumb.
PS: Note to the big G: Can you feel the Googlelove? Well, kindly trot over to my prior post and taste some Googlehate+