Naval said to productize myself. WTF does that mean?

Naval's wealth creation strategy is all about leverage, as the other commenter says...

Turn your skills into a product, automate yourself and sell your product

And as the Stratechery dude says, software has zero marginal cost, so just sell infinite number of copies of your software.

Generating more content, especially on social media, will NOT make you rich. I doubt that’s what he meant (I’m not familiar with him.)

Indeed, it won't. But producing more (quality) content is bound to attract like-minded people, who can then become an audience that may be willing to buy whatever you create later on. I think that's the message of Naval.

No. It does not mean this: "transforming your interests". It does mean transforming your special knowledge into a product, and (with the help of zero marginal cost) replicating this knowledge (what naval call leverage).

Its not about you interests or hobbies.

It means you probably shouldn't listen to Twitter philosophers too much?