I'm not sure Aseprite is an example to follow - just as they made this license change, a fork of the previous license - LibreSprite - has popped up. It lacks a lot of the features and bugfixes of Aseprite, but hey it's free, and many open source enthusiasts view it as the morally superior version.

This simultaneously shows the weakness of the open-source development model - a non-monetizable passion project can rarely match the quality of something with full-time devs behind it, and probably isn't something that the Aseprite dev(s) are happy about - it sucks to compete against your own product sold for $0.