The scammers don't necessarily work on the "greed factor". How would you like to find out your investment property had been sold without your knowledge, and the funds disappeared into some 3rd world banking system?
This happened several times in Perth, around 10-12 years ago. Fortunately, due to some good work on behalf of the W.A. Police, the AFP, and the South African Police, some of the scammers were nailed.
Despite all the knowledge about scammers, I reckon about every third business owner I speak to, has been scammed by a simple email - that has come from an intercepted email from a regular customer of that business - advising that bank details have changed, and "please pay to this new bank account number". Hardly a single business owner questioned the bank details change, and they lost heaps.
My nephew was scammed out of $30,000 in this manner - thought he was paying a business bill, and didn't find out he'd paid scammers, until the real business asked for payment. Real estate agents here were conned time and time again, with fraudulent official documentation, and changes to emails and bank account numbers, none of which was verified by the recipients.
https://www.consumerprotection.wa.gov.au/system/files/migrated/sites/default/files/atoms/files/issue30.pdf