What's so great about Mark Millar's products that Netflix has to buy them?

Netflix bought Mark Millar's publishing outfit, all so they can have another source for adapting comics into movies and TV shows:

Netflix has acquired Millarworld, the comic book publisher from Wanted and Kick-Ass creator Mark Millar, marking the streaming giant's first major acquisition.

Terms of the deal between Netflix and the comics world guru weren't announced. But Netflix and Millar will bring Millarworld’s franchises to life through films, series and kids’ shows available exclusively to Netflix members globally. Millarworld will also continue to create and publish new stories and character franchises under the Netflix label.

The acquisition continues Netflix's efforts to work directly with prolific and skilled creators and to acquire IP and ownership of stories featuring popular characters and fictional worlds.

Considering some of his books, like Kick-Ass, were written and illustrated more for shock value, I just don't see what's so great about them. But what really annoys me from a retrospective view is when they say Millar:

...is bringing Netflix into his superhero universe after working for eight years at Marvel developing comic books and story arcs that inspired the first Avengers movie (with his groundbreaking Ultimates books), Captain America: Civil War (with the 2006 comic book storyline Civil War), and Logan (with the Old Man Logan storyline that debuted in 2008).

This always comes as a source of dismay for me. Because sooner or later, somebody's bound to put two and two together, and realize the source of "inspiration" for the Avengers film happens to be a series where Millar pulled some pretty tasteless acts, including a scene where Giant-Man bit off the Blob's head. It's many of the more recent stories Marvel's churned out since the turn of the century that are awful, and no matter how the filmmakers spin them onto DVD, it doesn't change the fact that the original stories the films and TV shows draw from are some of the most lugubrious slop ever thought up. And even if the stories are aimed at an adult audience, does that make it any better? Of course not.

The point is that Millar's just not a very good writer, and his story creations, IMO, aren't something filmmakers should rely on for extended franchises.