ICYMI: Meta's embedded signup v4 is here - but the October 15 clock is ticking: Meta deprecates embedded signup v2 and v3 on Oct 15, 2026. Three legacy feature types require manual migration, or developers lose WhatsApp and Messenger onboarding. https://ppc.land/metas-embedded-signup-v4-is-here-but-the-october-15-clock-is-ticking/ #Meta #EmbeddedSignup #WhatsApp #Messenger #Development