Bre Pettis of Makerbot even posted a blog post of similar tone back in 2010, titled "Open Source Ethics and Dead End Derivatives", admonishing copycats for usin

Bre Pettis of Makerbot even posted a blog post of similar tone back in 2010, titled "Open Source Ethics and Dead End Derivatives", admonishing copycats for using Makerbot's open-source design files without contributing anything back. It used to be at this URL but they've taken it down, and I don't think the wayback machine has a snapshot. https://www.makerbot.com/stories/2010/03/25/open-source-ethics-and-dead-end-derivatives/ https://www.makerbot.com/stories/2010/03/25/open-source-ethi... Not long after that, they went full closed-source (and got bought out by Stratasys for a fortune). I'm sure Josef Prusa remembers that as well. I very much hope this isn't a sign that Prusa will make a similar pivot. I don't expect that it is.