Product is not reaching enough people. To make people aware about the product, we need that marketing/promotion/strategy/plan.

Increasing the number of people Farcaster is reaching without having solved retention (which is a function of supply of interesting and entertaining content) is a recipe for wasting money and time.

Isn't one function of the other?? More people  onboard to FC, more content in the feed.

Most new content is not widely interesting

Fair point. Still I believe targeted marketing would work. eg: try to onboard at least more crypto/tech folks rather than blind marketing for all audiences.