Nah, it's legit. He's got connections.
@ZenZu doesn't have real spoilers. I just share early leaks with him if they concern our mutual interests like admirals or Mihawk. I don't even share direct info with him. I'd just say random shit like, "You're gonna love this chapter."
I don't have a source. If early leaks say anything of interest to me, then I'd contact people who I know would get early spoilers.