The site creator was not a web developer at the time she made the website. She was likely following deeply outdated (2014 or earlier) blogger advice about how adding those stupid buttons "create engagement" by making it easier to share the article.
Unfortunately for her and the users of the site, the mere presence of those buttons would be enough for the FB/TW to link their accounts to visiting that website, if they were logged in on the same browser.
Unfortunately for her and the users of the site, the mere presence of those buttons would be enough for the FB/TW to link their accounts to visiting that website, if they were logged in on the same browser.