On the face of it these seem like tough times for financial scammers. The crash of 2008 burned investors, exposed fraudsters and has forced regulators to toughen up. Yet dodgy “pyramid” investment schemes that promise huge returns before inevitably collapsing are going strong, especially those targeting women. In late 2015 British regulators jailed the leaders of a plot that had duped over 10,000 women. In June 2016 authorities in Belize warned of a scam sweeping the country. America, India, Mexico and Indonesia have seen similar stories.