[monitorman]

If you clicked the article, you would see that it is in the first few paragraphs in bold: marketing and sales. Pretty much what most growth companies have to spend on in the earlier stages.

[jacquesm]

AirBnB is well out of their 'earlier stages'.

[kick]

I did click (and more importantly, read) the article, but found it vague. I was hoping for something that wasn't surface-level, unlike your comment.