When I see the Shutterstock sales map, I see not much sales from Asia.  Chinese and Japanese market can be big.  So, I think that's the market that they can cultivate more.  Maybe people over there mostly need local content rather than international content.

I think the bad sales have something to do with SS only accepting keywords in English and (Probably machine) translating it themselves. So, if your photo's description doesn't translate directly into the Asian language, nobody is going to find it.

I think they need direct effort in big market countries like China, Japan, Korea and India to increase sales and cultivate its potential.