First of all, no, 100 million viewers is not 100 million active subs. And Amazon has no way of knowing how many people actually watched the show, because you can't tell if there's one person in front of the TV, or 100. I broke that down in the post you quoted, but I guess you're not doing so well with numbers. My teaching days are behind me, so excuse me if I don't take you for a tour of basic math.
Even if you're being generous with the numbers, Amazon lost hundreds of millions of Dollars on that show so far, which they probably knew from the start. Making money was never the goal, it was broadening the audience. Unless they release sub counts from pre and post ROP, we'll not know if they achieved it. I doubt it, though.