The HE blockchain explorer shows @proofofbrainio is receiving but no longer dispensing rewards:
https://he.dtools.dev/@proofofbrainio

But if you do that for others like @leo.tokens (the LEO issuer account) it's the same pattern.

if I understand correctly what is happening is that Hive-Engine tokens like POB and LEO use a smart contract for tokens which mints and issues the tokens automatically independant of the issuer account (issuer accounts can manually issue tokens).