They actually said they'd be perfectly happy to open source it, provided they were paid: https://web.archive.org/web/20080514032748/http://www.object-arts.com/

They actually said they'd be perfectly happy to open source it, provided they were paid: https://web.archive.org/web/20080514032748/http://www.object-arts.com/content/blog/2007Sep07.html https://web.archive.org/web/20080514032748/http://www.object... I imagine that the value would have depreciated enormously in the nine years since then. I wonder if someone actually bought out the source, or whether they just gave up?