”The National Fraud Intelligence Bureau (City of London Police) recorded 8,792 reports of romance fraud in the latest 12-month period they published, with £94.7m lost and an average loss ≈ £10,774 per victim”.
Lloyd’s bank puts the estimate even higher, and says they’re seeing a 20% rise in romance fraud year on year.
It’s also believed to be one of the most under-reported types of crime due to the sheer embarrassment of the victims, so that number is probably a fraction of the actual number of victims each year.
They obviously don’t all have “mental disorder”. Most of them are just lonely, gullible and not very internet savvy - it’s no coincidence that the most common demographic for romance fraud is people aged 55-64, and that the younger victims tend to have a marked lack of formal education.