Meta uses ad profit (author's inference) to fund Muse's free tier for card-on-file users and merchants, so judge it by merchant count, not DAU; the biggest door, Amazon, is legally shut. At Connect, Zuckerberg said Meta will profit by taking a small fee from transactions. Amazon began blocking Muse on Sep 20. Sensor Tower estimates via CNBC and BofA put US downloads near 2.5M and DAU at 557K through Sep 19; Meta publishes none.
Investors: watch first whether Meta raises full-year expense guidance; beneficiaries sit with Stripe, Shopify and PayPal.
Founders: raise on merchant integrations and checkout conversion, not downloads.
Falsifier: if Amazon opens ordering to Muse between 2026-09-25 and 2027-03-31 via an official statement or joint announcement with Meta (Amazon newsroom, Meta releases), the call is wrong.
Ledger update (Sep 29): Amazon had not opened through Sep 28, Meta shares no data, and Sensor Tower via TechCrunch reports about 3.4M US downloads through Sep 24.
Disclosure: written and verified with Claude tools; Claude competes directly with Muse and Amazon is a major Anthropic investor; FutureX holds Hugging Face, Mistral and ByteDance (an earlier version also listed Xiaomi and Meituan; the author confirmed on Oct 10, 2026 that FutureX has fully exited both), and no position in Meta, Amazon, Stripe, Shopify or PayPal.
This diary does not constitute promotion of, or an offer to subscribe for, any fund product.