True Cases That Have Happened

AnO2O company used its users' phone numbers and personal information to register accounts on a competitor's app, aiming to prevent churn. This resulted in a paradoxical situation: when users wanted to try the competitor's app themselves, they found their phone numbers had already been registered by the company. Unable to register again and unable to recover accounts with incorrect personal details, these numbers were rendered useless. As most people lack the drive to use one specific service, this maneuver created an interesting protective moat.