Unless you’re in the advertising business, having members lead areas of the community (e.g. Reddit, StackExchange, and Nextdoor) isn’t the most valuable thing they can do.
Your best members, those with the magical combination of time, knowledge, and passion for the topic, should be guided to do the most valuable things. The very things that take the most time, knowledge, and passion.
Most people don’t really explore the full range of what this can mean. Responding to questions might be good, but creating incredible resources is probably better.