Sorry for the confusion, we are actually changing gears due to having unexpected success with selling flat JPG graphics, and are re-tooling for the following setup:
If you have an .EPS and a .JPG, -and- the JPG has embedded IPTC keywords, make sure both the files have the same base filename ("123-blue-spheres.eps" and "123-blue-spheres.jpg"). This will allow us to extract the keywords and apply to both. If you have just .EPS graphics, or just JPG graphics, and no keywords.. that's fine too, but it may slow down review times.
Upon approval, both the .EPS and the .JPG will receive their own inventory name on the site. In a nutshell - some clients want .EPS, some want .JPG - we offer each variation as a separate purchasable file, and not as simply an alternate download option.
This way, the artists can adjust their prices as they see fit- obviously a flat JPG is of less value than the same design in EPS, so if you want to play with the price spread, that's your choice and we'd love to see how it pans out for you. The trick is, for clients at the entry-level of graphics, JPG is the only option they can work with, so you may find the actual value for the buck to be really in the eye of the beholder.