It is a huge deal. But you didn't say which specific post or thing-to-learn was most effective at motivating. You just expressed a wish for something nice to happen.
I was avoiding specifics about how you'd enthuse them, thinking you'd know better which combination of points to use, but when you put it like that... fair point. I'll think about it...
Followup to: The Most Frequently Useful Thing
What's the number one thing that goes into a book on rationality, which would make you buy a copy of that book for a friend? We can, of course, talk about all the ways that the rationality of the Distant World At Large needs to be improved. But in this case - I think the more useful data might be the Near question, "With respect to the people I actually know, what do I want to see in that book, so that I can give the book to them to explain it?"
(And again, please think of your own answer-component before reading others' comments.)