alt Hacker NewsThe person you're replying to was making a clarification on the license, not arguing about the validity of changing the license or charging for it.
Libresprite is an important project because people can fork it and learn from it by extending it, and submit those patches upstream, regardless of how active it is.
I think aseprite is a perfectly fine project, but where possible, I like to use open source tools rather than proprietary tools.