Mackenzie has been a driving force behind Artkive's content since 2019, specializing in advertisements and organic content for TikTok and Instagram, as well as social media management. Brent Arneaud, a banking professional since 2013 and a personal trainer since 2011, began collaborating with Mackenzie in 2022, leading to the founding of Hart Content.

Their content has garnered millions of views, hundreds of thousands of followers, and weekly sales exceeding $3,000. In 2023, the company successfully launched a second business, Cards by Artkive, solely through social media marketing. Hart's effective social media strategy was even recognized and studied by Social Media Examiner at the 2024 Social Media Marketing World conference. 

Together, Mackenzie and Brent's combined skills and ability to reach diverse demographics, along with their two sled-trained Siberian huskies, offer a powerful and comprehensive content creation team.