What could the business plan of Poppy Playtime possibly be?

Starting from the first chapter, I was patiently waiting for the whole story to unwrap. It had a lot of promise, and gave creepy and enigmatic leads. I can't help but feel underwhelmed by Chapter Four. What could possibly be the purpose and the benefit of the living toys project? Why make thousands of failed experiments that had to be contained and ended up breaching the containment and killing everyone? Wasn't this super predictable from... the first few attempts? So much money, so much resources, so many people dead, all of it literally... wasted. Am I missing the key parts of the lore? What is the profit that pushed Poppy Playtime, an evil corporation first and foremost, to this edge? I was hoping that the Doctor could explain it, as he was obsessed with his project, but we didn't get anything but the promises of abstract "progress". Is this the tragedy? The idea that all this suffering was simply a black hole that ate everything offered? How the hell did they stay profitable? I'm sure the toys sold good, but I'm afraid it was not "several floors of state-of-the-art hi-tech equipment" good.