Don't force users to add a profile pic at sign up. Use whether they add a pfp later a signal as to whether they care enough about their app identity to add one.

You have the most leverage with a user adding something to their profile in the initial sign up flow 

I also think it’s encouraging an action which will result in a better experience for the user bc people like to see images on profiles and are probably more likely to engage compared to a profile with default image

Technowatermelon. Elder Millenial. Building Farcaster. 

nf.td/varun

There was an thread about this by @v you should read

If you remember the egg, it's important to dissect how default pfps can turn a user in.