In all of the research I've done into the jobs process, I've never come across one confirmed case of someone getting a "Longshot" or "Keep Looking" job.
In my opinion, they don't need to eliminate these, but the odds of landing a longshot or keep looking job should be improved so that it actually happens once in a while. It would add a lot to the game. Moving up in this game is hard enough as it is, but making some of these slightly out of reach gigs a legitimate opportunity would at least add some hope to the jobs process and would be really exciting if you landed one.