Not trying to throw my hat into the conspiracy theories ring, but I initially sat behind the Sky Blues bay and looking at the crowd from the other side it looked tiny. A nice spread of people, but there was a lot of yellow in between supporters.
When the numbers came up under 7k didn't surprise me (though it disappointed me), but 10k made me say "Really?".
I might not be able to guess for shark, or maybe when I looked a lot of people had popped out for a feed/toilet break. Or maybe I'm just shark at guesstimating and we did have over 10k. But I'm not shocked people are skeptical.