Well fair, I just found the Medium article to be more complete than most info that is shared around, but I already assumed that it was not complete. At the end the day I personally don’t have issues with Proton currently and they are still the best thing I can use since it’s located in a country like Switzerland. But I advice everybody to use their own custom domain so they can move whenever needed.
There are two reasons to go public, for one to make as much profit as and otherwise to get more funding than they can get through normal means to then make as much profit as possible.