The fact that "Zaps" are so low- to no-friction means there are countless ways someone can provide value and I can reward/thank them for it. It could be a comment, blog post, song, funny meme, an idea, a compliment, critique, conversation, services rendered etc. This seriously cripples the need for the ad-driven model that's unfortunately been a necessary "evil" on the Internet for the past 3 decades. That potential disruption is a huge thing I like about nostr, and specifically the LN integration.