-Firstly, unless you're getting some serious money, you should be keeping the copyright to your work.
Regardless, this distribution right should be temporary, usually though a given time period. (5 years, for example)
And there goes all of your hard work.
Then that print-focused company now owns the distro rights to the e-book versions of your story.
Most tiny publishers give you 50%, but at top ones you'll be lucky to hit 10%
In comics, this rate is extremely flexible, but generally, any companies worth your time pay over $100/page.
Otherwise, all you have is their good will, which a corporation has none of.