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.

What makes people sign up and not come back?

Photographer. Artist. Web3 Blogger. 
seemore.tv/lampphotography
nftartwithlauren.com 

I think that's half of it.

The other half is feeling like you a screaming into the wind. 

I got onboarded fairly early at ETHBoston (FID 12626). I casted for few weeks, got no likes, no replies nothing, and then just forgot it Warpcast existed for like a year until my art community from Twitter all aped in. 

I have no idea how to solve this, but maybe giving brand new users a visibility boost for the first week or something.

The dopamine from those notifications pings go a long way.

Lack of interesting and entertaining content.