In an internal email surfaced during the Meta antitrust trial, Mark Zuckerberg expressed concern about Instagram cannibalizing Facebook.Zuckerberg suggested ways to prevent cannibalization, including integrating Meta's apps and potentially spinning out Instagram.Evidence presented in the FTC trial indicates that Zuckerberg understood the threat Instagram posed to Facebook.Zuckerberg feared that Instagram's growth could lead to a decline in Facebook engagement as users shifted to Instagram.He raised concerns about the negative impact Instagram's growth could have on Facebook's engagement and profitability.Zuckerberg wanted integration between Facebook and Instagram to prevent network collapse of the more engaging product.He suggested reducing promotions to Instagram and enhancing integrations between the two networks.Zuckerberg emphasized the importance of branding to keep Facebook at the forefront of Meta's products.While considering spinning out Instagram, Meta chose to rebrand as Meta, with the logo appearing across all its apps.If the FTC prevails, Meta may have to divest Instagram and WhatsApp as separate entities, as Zuckerberg previously suggested.