There's a bit more context to the story. The author and the company had a discussion over a reverse engineering claim as well : https://github.com/UlyssesWu/D2Evil/issues/1

I have to admit I'm somewhat impressed with the quality of the 2d puppetry I've seen in gaming recently (e.g. Marvel Snap, andy of the Gachas). It's a simpler technical skill than full 3d rigging that 2d illustrators seem to be able to be able to pick up fairly quickly.

The field this tool grew out of (mobile gaming) is such a grey ethical area, and these puppet animations are a fascinating form of pulp media.