Aiken signed with the YouTube multi-channel network (MCN), Polaris, in October 2013. Currently he is signed on with the MCN StyleHaul on both his Ali-A and More Ali-A channels. Other notable YouTubers within the network include both of Daniel Middleton’s YouTube channels and KSI. According to Socialblade’s statistics, both of Aiken’s YouTube channels are within the top 50 in the network.

Aiken has made appearances on the television show The Gadget Show and was a guest speaker for them in 2013 and 2014. He was interviewed by the British Broadcasting Corporation (BBC) on 10 May 2013. Alongside KSI, Aiken discussed the new paid subscriptions that were coming to YouTube (YouTube Red) at the time. Aiken was featured alongside KSI and other popular YouTubers in Britain in a BBC Radio 1 documentary in 2014 called Rockstar Gamers. In 2015 BBC Newsbeat uploaded a YouTube video of an interview with Aiken. Within the video, he gave tips to improve player’s skills within First Person Shooter video games. Aiken has also been featured in the Mobile video game, Celebrity Street Fight, in 2015 alongside DanTDM, KSI, Marcus Butler, and Deji Olatunji (ComedyShortsGamer).

In October 2015, Ali-A was listed by Business Insider as the ninth most popular British YouTube star.

During 2016, Aiken teamed up with other large YouTube content creators within the United Kingdom teamed up with Mattessons as part of a campaign to teach young people basic programming skills. The campaign resulted in over 13 million views on YouTube and lead to over 24,000 youth learning basic programming skills in the programming language Python.

In January 2016 Aiken was subject of the documentary Minecraft: Into The Nether alongside other popular YouTube personalities such as KSI and TheSyndicateProject. The focus of the documentary was charting the “Minecraft phenomenon” through the quartet’s meteoric rise to online fame. In September of that year, wwd.com referred to Aiken’s audience size and following as a following that “most advertisers would drool over.” In both 2015 and 2016, Business Insider has listed Aiken as the ninth most popular British YouTuber.

In August 2016, Aiken took part in Cancer Research UK’s 1,000 hours of fundraising event according to cancerresearchuk.org.

On 7 April 2017, Aiken was mentioned in an article by Business Insider France. On 30 June 2017, it was announced as part of a joint statement by Sassy Films, CBBC and BBC Worldwide that Aiken will host a television show titled “Ali-A’s Superchargers (10×20′)”. The show “puts children in charge” of redecorating their family car, “without their parents’ input.” The BBC has called Aiken a “YouTube megastar”. Virgin Media published a brief online article in July 2017 about Aiken’s hands-on experience with the Destiny 2 Beta. In October 2017, Ali-A Adventures: Game On!, a graphic novel was released.