I think the misunderstanding comes from you saying "A does not imply B" and the other poster misunderstanding that as "A implies not B". This is a rather common mistake in arguments I find ):
The comment went beyond saying A does not imply B to say that A is completely unrelated to B, even outside of degenerate scenarios such as addiction. Claiming that purchases are completely uncorrelated with receiving value from something is a much stronger and obviously false claim to anyone who thinks about it for more than a minute.