Almazan Kitchen is beautifully produced.
Maangchi is my friend, she is just as nice in person as she is on camera.
The numbers by social blade are given as a wide range. Most channels (especially cooking) do not make on the high end. The biggest factor is where the viewer is watching from. Viewers from the US are at the bottom of the top bracket.
Bigger channels can make a lot of money outside of YouTube revenue. Endorsements, cookbooks, tshirts etc.