Hello, I'm one of the original members of Desktop Ponies, creators of the bases and animations you are using as templates to sell OCs.
Our animations, bases and all derivated works based on them are labeled under a CC BY-NC-SA 3.0 non-profit license, which states anyone can use our material as long they never use it for commercial purposes and never accept any kind of payment or voluntary donations in exchange for anything created with our base materials.
In other words, what you are doing here is illegal and I must ask you to stop it right now. Sorry.
Our group can be found here:
[link] so you can go and confirm my claim by yourself, and you can also get a more detailed explanation of the copyright claim protecting our material, along for the reasons we had to file it under said coipyright claim.
I hope you understand our stance, and I hope you also understand you can continue making paid comissions, but not using Desktop Ponies bases and derivate works anymore.