Rather than imagine what Twitter spends on what, you can find out for sure: <a href="https:&#x2F;&#x2F;investor.twitterinc.com&#x2F;" rel="nofollow">https:&#x2F;&#x2F;investor.twitterinc.com&#x2F;</a><p>All public companies have to report that stuff and it is usually free to download from their website.  It is an incredibly useful skill to learn to read annual and quarterly reports.  You can find out if your company is about to tank ;-)