The point of a newspaper's endorsement is not to bring the paper's owner "something". It is an editorial decision by the paper's editorial board as to what individual would be best in the job and who would serve the voters' best interests. And the Post's editorial board did just that. Before Bezos spiked the endorsement because it would "bring him nothing." He's welcome to vote for anybody he wants to vote for, and I suspect that, like you, he will be voting for Trump.
The publisher is the OWNER of a newspaper.
An editor is in charge of content, while the publisher runs the business side of things.
In most cases the staff of the paper reflects the views of the publisher. But not necessarily on each and every issue. And the publisher holds the ultimate power over editorial views.
Many newspapers do not endorse individual candidates, the Wall Street Journal is the most obvious one.
There is hardly any doubt on where the editorial staff of the Washington Post or the LATimes stands on who should get their endorsement.
But the Publishers refuse to let them.
Like me, I suppose, they find both candidates severely lacking so have decided to sit this one out.