Earlier quoted context omitted.
Have a read of this: https://meta.m.wikimedia.org/wiki/Wikimedia_Enterprise/Essay... ?
So summarize, are they more-or-less capping their APIs and charging for content they serve beyond that cap?
> access to Wikimedia content by reusers is currently achieved through three broad means: Scraping of web pages; data dumps; and APIs. These services are provided freely to all reusers of Wikimedia content. They are and will remain free, libre and gratis, to everyone.
> What many of the largest commercial technology organizations require in order to effectively utilize Wikimedia content goes beyond what we currently provide.