It's all about percentages. 1,000,000 scam attempts = a certain % success and % failure. No matter the % of success,. it's worth it for the scammers. I'd equate it to a salesman handing out his card to every customer that walks thru the door,. some hit the trash, some ignore him, and some get someone else...but a percent get him, with no work on his part,. but handing out cards.