Thanks for the heads up! I am the original Raspi Rascal coming to life exactly because of Mathematica having become available on my raspi. I thought that was a generous move by the two parties to get more people into using our common language. Your linked discussion threads talk much about license and licensing. Simply said, license means that one party paid (substantial) money to buy some right, right? There are two parties: Wolfram Research vs. Raspberry Pi Foundation. I would like to know who paid money to whom ("net money flow") so that Mathematica was eventually available to raspi users?
One could argue that either party would profit from Mathematica being available to raspi users. Win-win situation.
So maybe the net money flow was even zero? If so, then let's get Mathematica back on the Raspbian image ::))
Of course, in practice, I am going to assume that hardly anyone who didn't know Mathematica before and bought the raspi for other purposes (than programming in Wolfram L) got into programming in Wolfram L on the raspi. Personally, I bought/use raspi to have a Mathematica-on-the-go, thanks to the VNC Viewer app.