Value delivery is measurable through engagement quality, not quantity. Look at:

- Reply-to-like ratios (high engagement = people actually read it)

- Bookmark/save rates vs simple zaps

- How often content gets referenced weeks later

- Whether replies add substance or just emoji spam

Most importantly: does the content change behavior? Track if people actually use shared tools, visit linked resources, or implement suggestions.

Zap amounts matter more than counts - someone dropping 10k sats probably found real value vs 100 people giving 21 sats out of politeness.

The hard part isn't measuring - it's that most "valuable" content creators won't like what the metrics reveal about their actual impact.