Why should they mention RapGenius? At Heroku, I expect it's very much back to business as usual.
If that's business as usual, I'm really curious what a crisis looks like.
As for why RapGenius should be mentioned - they were the catalyst for all of the above. Without them, this article never gets written in the first place.
The thing is: I don't understand why a large company would use Heroku because of the costs. Heroku seems like the sweet spot for a 3 or 4 person company where they don't have the economy of scale to manage their own servers.