They're not unrelated. Advertisers like to know that their ads work; you need staff to do that.
Look at how much tailored the FaceBook ads were vs Twitter [1]. Advertisers would be sticking with Twitter if they thought the ads were worth it.
> Facebook targeting allows advertisers to drill down, ensuring your ad is targeted at those most interested in your ads’ content.
> The Facebook ad targeting based on interests looked like this:
> Science > Mari Smith > Joel Comm > Social science > HootSuite > Post Planner > Smart Passive Income with Pat Flynn > Kim Garst > Sprout Social > Social Media Examiner > Buffer
> Twitter’s targeting is not quite as refined, but we targeted these keywords:
> instagrammarketing > socialmediamarketing > socialmediaexaminer
[1]: https://www.agorapulse.com/social-media-lab/twitter-ads-cpc-...