According to Insider's sources, Facebook has already started the process, which it plans to execute via shifting performance expectations rather than outright firing hordes of staffers all at once."These 15 percent will likely be put on PIP and be let go," one Facebook worker reportedly posted on an anonymous forum called Blind, a popular app in Silicon Valley.Managers are at risk, too — one source alleged a number of them have already been PIP'd and told to find new jobs.Needs SupportBut while Zuck is clearly wanting to keep this massive workforce slash on the hush-hush, Meta's last few quarters speak loudly (as does randomly renting out the UFC Apex arena, but we digress).Blows to its advertising revenue stream have caused major setbacks, as has its failure to compete with TikTok."