I just wanted to point out something positive - a really excellent job by Shutterstock of presenting search results for more general terms with a large number of hits. I know it's inspired by what Google does, but among the agencies, I think this is by far the nicest arrangement of results (click thumb for full size)

It's visually enticing; there are a selection of refinements presented up to (again visually) and there's even a different season on the far right - in other words it's not just similar phrases but something more thoughtful. If you do more narrowly scoped searches you just get the results, so perhaps it's based on the number of results? That seemed to be the case with some serches, but
new england beach (with just over 1,000 results) gives the nice set of alternates up top, but
maine beach, with 1,900 results doesn't so there's something more.
Honestly, it makes the other agencies look really lack luster by comparison.
Kudos to Shutterstock for a job
very nicely done