It completely depends on how that count is done
if it’s individuals entering the arena each day, over the whole weekend, it was at 30% capacity and in no way one of the highest attended festivals in the UK
it was in no way as low as 30% though so that can’t be the measure, so as a number, with no context, “90,000” is meaningless.
Only one category of Leeds ticket seems to have moved on to second tier pricing at this point. I don’t think this is necessarily a sales indicator as much as a method to keep prices up north lower than down south but with this and the anecdotal video evidence, it’s clear Leeds has been nowhere near its capacity (of 90,000/ day) the last 2-3 years