Google genereert hiermee potentieel extra advertentie-inkomsten, want na een zoekopdracht in de 2e searchbox staan er ook gewoon ads.

Google geeft aan dat de 2e searchbox ‘algorithmically’ wordt bepaald:

This feature will now occur when we detect a high probability that a user wants more refined search results within a specific site. Like the rest of our snippets, the sites that display the site search box are chosen algorithmically based on metrics that measure how useful the search box is to users