Cook goes silent. Why?

For months the Cook Political Report has been releasing charts of competitive House races at a rate of about one per week. We’re 16 days into July, though, and the last one to come out was on June 24.

Why is that? Did everyone go on vacation, or is Cook having to re-run every race without Research 2000 polls? I’m not a subscriber, but judging by this Senate update which I’m told is disavowing R2k makes me think.