Based on this recent PFDB thread and also looking at ScreenToGif's license the selling of the program is actually allowed by the license but it requires including the license and copyright notice along with it.smaragdus wrote: ↑Thu Jul 25, 2019 8:22 pm A commercial company- Apowersoft, is trying to sell ScreenToGif as a commercial product- Apowersoft GIF, see this issue at GitHub. This is outrageous.
It's a controversial aspect to this since it doesn't usually come up in discussions and something I hadn't put much thought into prior to that topic (mostly since commercial programs based on open source projects I'd seen before typically add something of value to it and aren't trying to hide what it's based upon, whereas I don't usually see essentially identical copies being sold sans attribution).