No commercial use.

Unless you have my explicit permission and we come to an understanding.

The rig/model must also not come from an existing IP.

Yes, you can share the rigs and modify them as much as you want.

However reselling it is not allowed. The rigs are created for these intented uses : study and fun.

Yes! You are free to use them in your demo reel. Feel free to tag me your reel here or in my Discord.