Yeah, but Madoka isn't from Manga roots, it's an original anime. It's also ingrained deep in the lore of the Madoka universe that there are multiple universe's. Attack on Titan's plot structure is pretty linear in comparison. Madoka has also been out longer in the anime world, but overall has been around a less amount of times. Attack on Titan only really picked up speed when it was adapted into an anime.
I'm not sure what the investment in Madoka was, but I'm pretty sure it was built to support it's multiverse structure from the ground up. It could just be coincidence, but nothing come out the over that well baked by accident. On the other side, some of the Attack on Titan spin offs make little sense. Not so much to it's cannon, but it's existence in general. It's like the Evangelion spin-offs all over again.
But it doesn't matter how you look at either of the two, it's still milking something for every penny. It's just one was cynically designed to be that way and the other was picked up off the street in it's early years. All in all, I don't care about the intention, as long as I, (the end user) enjoy's the product, it's win,win.
I have no idea how commas work
Yog: Praise the sun that is Top Gear Tony, a friend to all.