it seems those vector are from 123rf.com.
I got 2 raster illustrations sales there recently, and surprisingly got 2 video sales too from my tiny video portfolio.
one thing interesting in pond5 is u can set your own price. But the interface is something they can improve..like too many similar tab, like 'my profile' 'view profile' 'edit profile' 'overview' 'preferences'..i always end up to click around to find what i want.
this is a referral link.
Pond5 Stock Footage
It's so strange. I have just send an email asking why they don't accept vectors. You can find there are vectors file on their database.