Писал в супорт и вот что ответили:"Hello!
Thank you for your email regarding uploading vector images.
Two files must be supplied at the same time: An EPS file and a low-resolution
JPEG (for use as a preview image).
Each file must be named exactly the same, character for character, except for
the extension. For example:
1. vector_example.jpg
2. vector_example.eps
When you upload your batch, the system will automatically recognize that you
have uploaded a vector file.
You can now upload vectors that are compatible with Adobe Illustrator 10. We
will continue to accept files that are compatible with Illustrator 8. With
both Illustrator 8 and Illustrator 10 files, the maximum file size is 15 MB.
IMPORTANT NOTES:
1: Please wait until both files have uploaded before proceeding to keywording.
If you begin keywording before both files have uploaded, the .jpg image will
be rejected as too small, and your vector submission will be rejected.
2: You must check the category "Illustrations/Clipart," and you may choose one
additional category. The system automatically adds vectors to the category
“Vectors.”
3: The .eps file may not exceed 15MB.
4. We recognize EXIF information in the .jpg and in the .eps.
More information on vectors is available at
http://buzz.shutterstock.com/
* * * * * * * * * *
Need more help? We are happy to further assist. Please do not start a new
thread - simply reply to this message with your username or email address
associated with your account. This helps us keep track of your questions and
answer them as quickly as possible."

Что бы понять что они написали пользовался переводчиком Google

,само собой перевод получился корявый и не везде понятный

.Не возьмёт ли кто на себя труд перевести на понятный всем русский язык

.