Why would a creator of a series pull licensing rights away from certain companies?

For example, a creator of a manga and anime series pulls all of the licensing rights from companies outside of Japan?
What could be the motive for this?

hm…maybe its because they saw how some foreign companies screw up their stuff? i dunno, but i have seen some pretty bad dubs for some anime (namely the english dub for Vampire Princess Miyu. that made my ears bleed O_o)

or b/c they just dont want it licensed by other companies. maybe like kids. like "i’m not doing much with it, but u cant have it cause its mine"

i dunno ^^;