Corney - "So, on the one hand, Watchtower publishes both 'good' and 'bad' (e.g., Germany, Japan, Poland) figures, and its statistics are generally corroborated by census and survey reports... On the other hand, people dislike and distrust them because they are lying assholes, therefore all Watchtower's reports are FAKE NEWS... Sounds like very strong argument, doesn't it?"
That's an oversimplification of what we're trying to say, I think.
Remember, in Watchtowistan, growth equals God's blessing. It's been viewed that way for decades, and is, IMO, way too integral a component of WT ideology to ever truly abandon.
As such, I personally suspect that the Org publishes just enough accurate and corroborative(ish) statistics to suit that purpose...
...(i.e., admitting what amounts to slight decline in some regions, but greater increase in others to still give the overall impression of growth)...
...whilst abso-fucking-lutely withholding the full extent of the facts.