Talking to them on the phone it appears if you use one of their models in any form where the end user can get the model data you need a license. This holds true for any artist whose assets you use
For example you us Genesis 3 (daz original) and say hair (made by Acme) to create a character. You will use this character in three projects
1. A 3d Tomb raider clone: For this you will need to buy the game dev license for both Daz Original and Acme
2. An animated film: Since the end user can not get the modeling data you do not need a license
3. A digital novel that uses pre rendered 2d images of the character again since the end user will not be able to get the model data no license needed
So right now the question is “Can the end user access the model data?” if the answer is yes you need a license otherwise you do not
UPDATE wanted to get prices
Daz indie license is 2500 but goes on sale a lot
Other artist charge between 500 and 2500