Also wrt 'headphones' example. Instead of looking through my wot circle for reviews, I could post 'please help me choose headphones' message that could propagate through my wot circle until some experts see it. They could reply with 'here is a one liner big advice, and here are a couple links for you to read, and if you want to hop on a call - schedule here and it will be 5000 sats'. This might turn out as a better solution to 'help me buy headphones' problem than trying to fix fake reviews or increase the review density in my wot.