I think that it was especially relevant in this case as the guy running the incubator was on LinkedIn checking the profiles of all the people that were applying.
I imagine the candidates were sorted digitally at multiple points to narrow things down and share among those hiring. During the arduous process the weary workers take their glance away from the screen to relax for a second only to notice their company's name -- or bosses face in an odd place on the web page they now have memorized from screen burn-in and that's precisely when this ad is almost (IMO not almost) guaranteed.