BOTW has for years had pages that did not show PageRank, and many pages still show PageRank. No change.
They also have almost 9 million pages indexed. Take a look at the backlinks behind BOTW, that tells a clearer story.
If you knew anything about the toolbar (and you should since you've been here long enough) then you would already know that Google manipulated the toolbar about five years ago to not show PR on certain kinds of web pages. At first it was rough and it showed white bars on pages like IBM's corporate partners page, then they refined it to only show on links pages. This was initially done to manipulate webmasters into slowing down reciprocal link exchanging, which at the time had gotten out of hand.