LOL, I remember this one being a famous traitor to FOSS by starting out as a community project and then closing doors to make money from it. Guess they weren't able to make any money after all. Karma in action.
And you say this as a prolific open source contributor I’m sure.
Or it's just another example of why FOSS fails - people (like you) expect free labor and never want to pay for it. They tried to make it a sustainable project, and it would probably have died even earlier if they didn't.
> For the last 5 years, PySimpleGUI offered free software with the hope of sustaining the project with donations. We appreciate the support we received, but the amount has been too small to support the project.