Is Blake telling the truth about the leads?
Blake says he can go out with the leads the salesmen already have and make $15,000 in two hours. Do you think he really could do that and it's just that the salesmen are incompetent? Or is he knowingly giving them an impossible task and just bragging to boost his ego?
The only lead we get to see is Mr. Spannel and he is quite visibly already annoyed with the company and wants nothing to do with them. So could Blake really have made a sale with a lead like that?