Graphisoft continues to lead with flexible pricing models for their BIM authoring software package, ArchiCAD 13.  More popular overseas, Graphisoft first introduced their Star(t) addition priced at $1995 and now introduced ArchiCADRental (ACR).  ACR allows users to flex into ArchiCAD based on need and essentially usage.  Allowing users varying price points to get into a BIM package is definitely a good thing, I think the ACR model tests the waters for a demand / SaaS based model.  Initially, the model allows for 1, 3, 6 month and 1 Year pricing models.