In the 1970s/'80s letter letterboxes of white people were littered with letters from Nigeria, Benin, and Ghana offering millions of $ of lost and found money. These days the internet has widened the target spectrum at much lower costs for whites still to fall into their African traps.
Common Africans use social media to contact white people abroad by chance unknown to them. They introduce themselves by "Hi, Hey, Hallo, Good afternoon" not by saying who they are and what they want. They jump onto the banned wagons without knowing much about the people they want to communicate with.
Whites with contacts in Africa seem to be easy targets. Little do they consider such whites already give help and money to Africans, African relatives, pastors, and organizations. They ask the whites for financial support, jobs, help to set up a ministry, visas, contacts, and the alike. While such whites are already tied up whites with no links to Africa are not seen as an obvious choice to contact in the first place.
When these common and desperate Africans are asked whether or not they would help people they never met in person with jobs, money, or visas they answer outright "No". In the back of their minds, they hold onto their belief that communicating nicely with a common white man and supporting his social media efforts would create over time that much trust that eventually the white person would sideline his conviction never to give to someone only known to him via social media. Simple-minded whites fall for this strategy as they did fifty years ago.