Thank you all for replies.

Good to know about the kill fee option.
Here is another situation that isn't a "no show" but leads to a similar result:
Both male and female performers appear, they start fucking but the male shoots too early and can't get it up for another round. The scene is incomplete and mostly unusable. Now what? Does something like the kill fee work here? I have recently experienced this and the model wanted the full pay

- sure, not her fault, but not my fault too.