https://www.nytimes.com/2021/03/25/technology/facebook-twitter-google-capitol-riots-hearing.html?searchResultPosition=7
My first database search was NYTimes. Initially, I searched “social media news” and found 43,956 results. I searched “news behavior” and got 2,474 results. Finally, I searched “antitrust” and got 569 results.
From “social media news” search:
Albeck-ripka, L. (2021, March 16). Facebook agrees to pay for MURDOCH’S australia news content. Retrieved April 06, 2021, from https://www.nytimes.com/2021/03/16/business/media/news-corp-facebook-news.html?searchResultPosition=4
From “antitrust” search:
Mccabe, D., & Kang, C. (2021, March 25). Lawmakers grill TECH C.E.O.S on Capitol RIOT, getting few direct answers. Retrieved April 06, 2021, from https://www.nytimes.com/2021/03/25/technology/facebook-twitter-google-capitol-riots-hearing.html?searchResultPosition=7
The second database that I used was Newswires. The first search I did was “social media news”. This resulted in 41 search results. I also searched “social media” and got 1,378 results. Finally, I searched “internet” and got 1,264 results.
From “social media news” search:
Customer satisfaction with social media and digital News Falters despite TRAFFIC Surge, ACSI data show. (2020, August 04). Retrieved April 06, 2021, from https://www.businesswire.com/news/home/20200804005015/en/
From “internet” search:
By BOBBY CAINA CALVAN and MARCY GORDON – Associated Press. (2021). Big Tech’s outsized influence draws state-level pushback. In AP Top News Package. Associated Press DBA Press Association.
It looks like your search on ‘news behavior’ in the first database and ‘social media’ in the second database search have promise, the results were not too large and not too small. Doing an advanced search on those simple searches might narrow down your list to some very good usable sources. This is an interesting topic. Good luck.