Originally Posted by
WineCountryUA
No, if less than Y9, then you can sort of believe, otherwise if there are multiple 9s on economy fare class, then it not providing anything useful
So except when Y is nearly fully booked, there is no useful, public, information on economy load.
The for sale numbers don't match actual loads, due to overbooking both into premium cabin (if any) as well as in general (expecting no-shows/misconnects/etc).