@cstross
The web of 1996 didn't pay much heed to the W3C, it was all about Netscape and Microsoft throwing non-standard features at each other trying to win ”the browser war”. Even if the W3C recommended micro transactions it would have gone nowhere unless one or both of them were interested in supporting it.
(Note to younger readers: both companies made money selling server solutions; the browsers were ”loss leaders” even before the price was driven to $0)