This is a nuanced, but important distinction b/c incentives matter -- you are much more likely to hear about the value of the nostr:npub17tyke9lkgxd98ruyeul6wt3pj3s9uxzgp9hxu5tsenjmweue6sqq4y3mgl project via the latter, whereas the former is more concerned with realizing some kind of financial benefit from selling (or referring you to) a product.

Bitcoin product != Bitcoin project