To discover value, you must form your best assumptions into one proposed MVB and run live experiments to generate learning.
Learnings are gained through tightly measuring people's reaction to your MVB. To be effective, you must get outside of your building and dig into the relational metrics of activation, engagement, and passion.
Host a meetup and measure who shows up. Participate in social conversations and measure engagement. Or simply buy an early adopter a coffee and have a meaningful conversation.
These learnings become the basis for decision making grounded on empirical evidence rather than subjective opinion.
You preserve the parts that resonate and iterate on the parts that don't, until you find brand-market fit with an audience.