Do you know how they monetize? I know it's a bit of a cliche asking that (you're the product etc.) but I'm really curious - using the Google API for search isn'

Do you know how they monetize? I know it's a bit of a cliche asking that (you're the product etc.) but I'm really curious - using the Google API for search isn't cheap at scale. If they are using a video of Snowden, they may have some philanthropic money - or it may be something nefarious. I'd love to give them the benefit of doubt though.