I strongly agree with this. They didn't become a regular user, but I have a friend who views LW positively because they found Pain and gain motivation very helpful. (Funnily enough that's PJ Eby's work.) My friend wanted to be a comedian and would always punish himself for not working harder at it; he stopped punishing himself and now he has notebooks full of comedy bits written down. I find that typical LW users are all about epistemic rationality, but most other people don't really care until they see the benefits of some instrumental rationality.

Hopefully I can indoctrinate him further at a later date. >:D