Earlier this week I received a request to connect through Skype. Since I work with international students, I generally accept these unsolicited invitation. The next minute I get an international Skype video call from who knows where - Probably Nigeria - from a young man with no shirt and in his underwear trying to convince me that he needed my bank account information so he could transfer millions of dollars to me.
The sales pitch was unconvincing and I immediately blocked him. But my experience falls in line with your story. These people just don't even try to be convincing.