Markiplier (born Mark Edward Fischbach) is a highly influential YouTuber, gamer, actor, and entrepreneur who built his brand through horror-game play-throughs and comedic commentary. ( ) Beyond earning tens of millions of subscribers, he co-founded the apparel and lifestyle brand Cloak (with fellow creator Jacksepticeye) in 2018, demonstrating how creator influence can scale into consumer business. ( ) His diverse ventures—including interactive YouTube originals, live tours, and merchandise drops—showcase the creator-to-founder transition from content to commerce.