Visa bet its future on AI — then cut 2,600 of the engineers who build it
In July 2026 Visa cut ~7% of its staff, hitting the technology and product teams that build and run its network — while citing AI as the reason for the cuts.
Ler o casomistake.clubUM ARQUIVO CASESTUDIES.CHAT
Aprenda com os erros.
De preferência, os dos outros.
Fracassos de negócios, decisões caras e as lições que deixam.
O arquivo completo, no appOs artigos estão em inglês e chinês simplificado. Títulos e textos mantêm o idioma de publicação.
Casos publicados
2,000 CASOS PUBLICADOS · ATUALIZADOS REGULARMENTEThe Yinyang Master 侍神令: a game-IP film that lost ~¥600M
NetEase's hit game 阴阳师 became a ¥6亿 film that grossed only ~¥2.6亿, the weakest of the 2021 Spring Festival slate.
Ler o casoSéralini's rat study claimed GMOs caused tumors — and it was retracted, then republished
In 2012, Séralini published a study claiming GMO corn caused tumors in rats. It was retracted for methodological flaws, then republished elsewhere.
Ler o casoYelp's ad-churn story became a $22.25M securities settlement
Yelp investors said churn hurt local-ad growth sooner than disclosed; the 2017 class action settled for $22.25M.
Ler o casoHuiyuan gutted its own sales force for a Coca-Cola deal that regulators blocked
Huiyuan agreed to a $2.4B Coca-Cola buyout and hollowed out its sales network. Regulators blocked the deal in 2009; Huiyuan never recovered and was delisted.
Ler o casoOptus left 10 million Australians without service for 12 hours
A 2023 software update took down Optus's entire Australian network for half a day, triggering a CEO resignation and a parliamentary inquiry.
Ler o casoPetro-Diamond Singapore lost $360M on oil derivatives — Mitsubishi's rogue trader
Mitsubishi's Singapore oil unit lost $360M in 2019 when trader Wang Xingchen made unauthorized oil derivatives trades.
Ler o casoLidl's influencer posted a tray of pain suisse — the first UK junk-food ad ban fell on it
Lidl paid an influencer to promote its bakery on Instagram; the post showed a pain suisse. New UK rules made that a banned HFSS ad — among the first such bans.
Ler o casoHeroku ran every customer in one AWS region — then EBS broke for 80 hours
A botched AWS network change stuck 13% of EBS volumes; Heroku's single-region platform kept apps down for up to three days.
Ler o casoFralsen: Besançon watchmaker liquidated after its holding drained €2.8M
Timex's Besançon plant since 1962, bought by ACI in 2024, liquidated March 2026 — 63 jobs gone, €3M treasury never returned
Ler o casoDraftKings and FanDuel killed their own merger 24 days after the FTC sued
The only two daily-fantasy heavyweights merged into a 90% market; the FTC sued under the Clayton Act, and eight months of deal work ended in a walk-away.
Ler o casoLotte Duty Free launched a fashion brand with 1MILLION — it lasted seven months
Lotte Duty Free's first own fashion brand, built with dance studio 1MILLION, launched November 2024. Sales ended June 16, 2025; the mall closed July 17.
Ler o casoShogakukan rehired a convicted abuser under a pen name; its committee said it aided harm
A third-party committee found three Shogakukan decisions on a convicted abuser could be seen as fostering human-rights violations.
Ler o casoKanadevia's ship-engine units faked fuel data on 1,371 of 1,375 engines shipped since 1999
Kanadevia's engine subsidiaries rewrote fuel test data on nearly every marine engine shipped since 1999; executives knew by 2015 and let it run.
Ler o casoYoshitaka Fujii published 183 papers on fabricated data — the largest medical fraud
Japanese anesthesiologist Fujii fabricated data in 183 papers over 20 years. A journal editor's suspicion exposed the largest medical fraud in history.
Ler o casoYogiyo forced restaurants into app-price parity and drew a ₩468M fine
Delivery Hero Korea made restaurants keep Yogiyo cheapest, then Korea fined the platform ₩468M.
Ler o casoSuntech Power, world's biggest solar maker, defaulted on $541M in eighteen months
Shi Zhengrong built the world's largest panel maker on debt and a NYSE listing. Overcapacity, a $680M fraud and US tariffs killed it in eighteen months.
Ler o casoMedtronic recalled 64,174 insulin pumps it could not patch against wireless hijacking
Researchers showed a nearby attacker could change insulin doses over radio; the old pumps had no software update path, so they were recalled.
Ler o casoBybit's signers approved a transaction they couldn't see — $1.5B gone
Hackers hijacked the multisig signing screen Bybit used. Signers approved what looked like a routine transfer; 401,000 ETH left the cold wallet.
Ler o casoChayan Yuese, a brand built on original design, was caught copying twice in under 50 days
The tea brand's co-branded notebook copied independent designers. It admitted 'unauthorized appropriation' and pulled it — its second plagiarism in 50 days.
Ler o caso