Musclular Development (which used to be "all natural muscular development" until they saw that hurt sales) is owned entirely by TwinLab.
the entire thing is an ad that you can subscribe to.
the other ones are the exact same, just a more hidden route to who pulls the strings.
if your largest amount of ad revenue comes from one source and you couldn't exist without them, I suppose you are gonna do what they want - so they in effect own the mag.