I addressed this question several months ago here and in the product forum. The majority consensus then was that the experienced users don't want bump maps. They use a generic bump they have created or prefer to make their own. The inexperienced users were happy with a bump map unless they were on dial-up connections. I have stopped supplying bumps in most V3 and M3 character textures in order to include multiple texture maps for additional effects. I have received no complaints or requests for bumps since then. Maybe people are changing their minds. It is a very valid question that needs to be revisited often to assure buyers are getting the best value. Especially with photo composite skin textures becoming more prevalent, the file sizes of textures are growing larger and larger. Do people want more texture variations available or a single texure with better bump file options?