From the most recent 10Q. Revenue was $125M ($105 Ads / $20 Subscriber). Expenses: $82M Content, $10M hosting, $7M Prod Dev., $40M Marketing/Sales, $14M All Other. Net Result: $28M loss.
Zero.
Marketing and Sales is primarily the cost of selling advertisements, including all the required employees. Selling $100M worth of ads isn't easy, (unless you are google).
Pretty sure anyone subject to the real rules is disallowed from doing this thanks to the dot com boom/bust.
If that nonsense was allowed, then every company would show revenues in the billions. The finance department would pay the the HR department for HR services, the marketing department would buy millions with their own company, etc.
It is common for internal accounting books to record these intracompany expenses/revenues for record keeping. For instance a TV Show pays for ads on the same network, but before Disney reports profits publicly all of that accounting cruft must be removed.