First they made it commercial. Then they realised there were not enough people prepared to pay for the project and shut down the project. But now it is back in free form?
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.
I think AI coding has made these "we dumb down a real UI framework for you" libraries obsolete. Anyone can get a GTK or QT app up and running now. This isn't a criticism, they were very useful to build GUIs in the past, but now they are just obsolete and more likely to introduce bugs or limitations you can't work around than to help much.
Every time I needed a GUI, I reached out to this library. Very beginner friendly. Good memories.