They make their content very affordable. 

When you see items for $6 and $9 you dont hesitate to buy them, I've bought more stuff from Daz than any other 3D Content provider, because of how affordable they are.

dogor:  High End apps can still give away lighter version of their apps.  Music Software companys give away free version of their apps all the time.  Giving stuff away does not deminish the quality of the software.