No, these can be used for commercial products for as long as you agree and comply with what I comment and ask in the art pack description.

You can use the images too, but I'm afraid I did this years ago and don't have a better version of these to share...

Perfecto, me alegro de que les encuentres buen uso. Deseando ver el juego llegar a buen puerto, muchos ánimos ;D

For your free use on your ttrpg and other stuff for as long as it doesn't promote

Racism

Sexism

Homophobia

Transphobia

Violence toward minors or animals

Any form of mental and/or physical abuse

Crediting is appreciated but not mandatory.

Thanks a lot ;D