Looks like your explanation of RSS was not entirely successful, as RSS has very little in common with Usenet except for the fact that they both deliver information using pull model. RSS resources are individual data streams, Usenet groups are unstructured assemblies of multiple messages. RSS resources are delivered automatically by site aggregators, Usenet messages have to be posted. Usenet needs NNTP servers that store huge amounts of data, RSS doesn't need anything but reader. Usenet is centralized, RSS is distributed.

In short, calling RSS "reimplementation of Usenet" makes very little sense.