The "arousal" here is literal and psychological. Creators use the suspense of a bet (Will they double their money? Will they lose their entire stream budget?) to keep retention high. The ambition being aroused is the viewer’s own latent desire for quick, dramatic success. Platforms like Betzz (in its digital entertainment form) collaborate with these influencers to produce "riskumentaries"—short, high-energy videos where personal ambition is directly tied to a wager.