I have a suggestion that might work or it might not.

I was thinking you could add a subscribe feature to this forum maybe? If there are certain forum members you think give great advice and really help you, you could choose to subscribe to their posts and/or threads?

Others would be able to see how many subscriptions the member has and would maybe take their advice more/less seriously depending on the amount of subscribers they have.

Also, this would kind of act as an incentive for members to write out better threads and advice.

Just a random thought