I've spoken with the Slack Team and they are big fans of this product. In fact, I've had several team members email me to thank me for building this product.
I included the note as the top post to clearly state that this isn't an official Slack product.
The site drives traffic to Slack and I do not make a single dollar off of it (despite many offers from advertisers).
How do you reconcile the comments you have received with the company's very recent public statement that "these communities are not something we have the capacity to support given the growth in our existing business."? [1]
Good question. As I understand it, their ability to "support" these communities is more about building out these communities internally and allocating technical resources to non-enterprise channels.
Again, I am not an employee of Slack and do not want to speculate but that's my best guess.