Confused on park hours estimates/actuals and rolling 180 day window

So disney is releasing park hours 180 days in advance. I go to the website and it stops in August 2019. However, for the past 2 days, i have gotten emails from touring plans, saying here are the hours for Sep3, now Sep4. (My stay starts on Sep 3 so I am tracking that day)

How is touringplans.com getting hours 189 days out?

The initial park hours (most likely they can change) are published in other places. This website has the whole month:

Just bear in mind that all the sites with “official” hours listed beyond those posted on the WDW website are not actually official. That being said, I tracked KtP’s advance hours for a little while and he was spot on - I believe that he has a mole who gets him the WDW hours for a given month when they release them internally for planning purposes.

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thanks @brklinck and @PrincipalTinker