Ah, this thread again- it seems to pop up every now and then...
Those who make only a little or nothing will often be willing to share, but those who make more have nothing to gain from it (outside of possible drawing unwanted attention to their channel).
The majority of people don't like sharing their income with others- especially strangers... and, for something like YouTube, when ample tools are available to get a rough idea of someone's earnings, it seems even sillier to ask.
It seems far easier (and less invasive) to follow the general $1 for every 1k-2k views and search different channels on Socialblade.