Of course the money is the only thing that matters to them but I also think that keeping quiet on actual attendance data helps keep us little old peons from noticing declining viewership and ever inflating ticket costs.
It’s funny how $$$ sales of tickets (not numbers) make headlines, as if anyone who does not have a financial stake in the movie (production team or studio investor) would give a damn.
“Ooooh! I bet my ticket money on the number one winner! Boo ya!”