There are many ways to give positive feedback. Money is only one system. Sure, it's prevelant, but it's not the only way people measure or indicate appreciation. For example, there are situations where a sincere gesture of gratitude means a lot more than money ever could.

Reminds me of the trap I often get into of thinking that if something isn't on google, it must not exist.

People often get caught thinking that something's common monetary value is equivalent to its worth, to its potential. That's just not true!