Bangladesh, Dec. 4 -- A sweeping, multinational crackdown on fraudulent advertising networks and crypto-investment scams has exposed the growing sophistication and scale of online financial crime across Europe and Israel. Law enforcement agencies say the suspects operated a vast corporate-style machinery that pumped out deceptive ads, lured thousands into sham investment schemes, and laundered hundreds of millions of euros through complex crypto channels. The latest phase of the operation marks one of the most coordinated efforts yet to dismantle an ecosystem increasingly powered by deepfakes, social engineering, and aggressive affiliate marketing.

In early November, authorities in Belgium, Bulgaria, Germany, and Israel conducted synchro...