I'm comparing them because in both cases you 'spend' the LP. What you get from it doesn't change the fact the LP is gone in exchange for something, whether it be a business improvement or fancy clothes.
I was under the impression that the errata just changed the 6 to a 9, not the entire 6/12/36 sentence; and I had seen other people discuss on this forum the idea that the math doesn't add up unless you make it 12/18/36 (that latter part was an assumption on my part).