> Case studies, focus groups, surveys and interviews are great ways to find the unknown unknowns. Of course, you need to pay people to participate in them, and then you need to pay expensive employees to conduct, collect and analyze the results
No they're not, because the vast majority of people simply won't be bothered, and most people probably aren't as reliable as concrete data.
People will be bothered if you pay them. DigitalOcean does this with focus groups for developers, and offers $500+ each for an hour or two of developers' time.
No they're not, because the vast majority of people simply won't be bothered, and most people probably aren't as reliable as concrete data.