I haven't followed the case closely...had the impression Mackey posted some memes poking fun at HRC, blah, blah, blah.
Facts and details matter.
https://www.justice.gov/usao-edny/pr/social-media-influencer-douglass-mackey-convicted-election-interference-2016"As proven at trial, between September 2016 and November 2016, Mackey conspired with other influential Twitter users and with members of private online groups to use social media platforms, including Twitter, to disseminate fraudulent messages that encouraged supporters of presidential candidate Hillary Clinton to "vote" via text message or social media which, in reality, was legally invalid.
For example, on November 1, 2016, in or around the same time that Mackey was sending tweets suggesting the importance of limiting "black turnout," the defendant tweeted an image depicting an African American woman standing in front of an "African Americans for Hillary" sign. The ad stated: "Avoid the Line. Vote from Home," "Text 'Hillary' to 59925," and "Vote for Hillary and be a part of history." The fine print at the bottom of the deceptive image stated: "Must be 18 or older to vote. One vote per person. Must be a legal citizen of the United States. Voting by text not available in Guam, Puerto Rico, Alaska or Hawaii. Paid for by Hillary For President 2016." The tweet included the typed hashtag "#ImWithHer," a slogan frequently used by Hillary Clinton. On or about and before Election Day 2016, at least 4,900 unique telephone numbers texted "Hillary" or some derivative to the 59925 text number, which had been used in multiple deceptive campaign images tweeted by Mackey and his co-conspirators."
With the underlying facts of communicating about suppressing the vote and targeting people of color...enjoy your stay in the gray bar inn.