Yes, but
Yes, but
Yes, but
Y'all, the overhead bins and the seats have different weight ratings. If has nothing to do with the overall weight of the plane, they just don't want the bins to come crashing down on your head mid-flight.
Checked bags don't go in the overhead bin.
The checked bag weight limit is to protect the worker who has to lift 100s of bags per day.
My carry-ons have always gotten weighed, as well as my checked bags. I've not flown in about 15 years, so maybe that's not as common now?
If was about overhead bins collapsing, they would reject the carry on bag and not just charge extra.
The sign says "max", so I figured this is referring to weight capacity and not cost.
Max before they charge extra.