free signup to read-only herocast

- free signup to read-only herocast - channel search for new casts: Improved and more reliable - better onboarding experience → get my $DEGEN tips when you try /herocast on desktop and provide feedback https://paragraph.xyz/@hellno/herocast-log-nr13?referrer=0x6d9fFaede2c6CD9bb48becE230ad589e0E0D981c