Rogue advertisers can camouflage their content on your favourite websites to trick you into adding your card details, Which? Here, we expose how a hidden banner left one BBC user trapped in a monthly subscription to an obscure 'tech education' e-book business. Hidden subscription trap on BBC websiteWhile holidaying in France, Robin was viewing the BBC News website and spotted what he assumed was a routine security check. After sharing card details, he found he’d subscribed to a service called ‘MyTechTeach’, costing €29.90 a month with only 24 hours to cancel. Tip: If you’re caught in a subscription trap, contact your card provider to stop future payments.