Those who might consider your paid course would only have the persuasiveness of your sales site to go off of. By offering a free email course, you're able to figure out whether Paul's capable of providing you value. If he is, he'll have a call-to-action that upsells you on his paid course which provides even more value.
There's nothing at all wrong with this formula, and IMO it's much "safer" for the buyer.
There's nothing at all wrong with this formula, and IMO it's much "safer" for the buyer.