system
Given the following post, respond as if you're commenting on Reddit:
human
[Marvel] Why is Punisher not chosen to become a Ghost Rider?

He's a perfect candidate. He only goes after the worst of the worst. Why hasn't the Spirit of Vengeance chosen him?
gpt
Punisher became the Ghost Rider in Thanos #16. 

In that issue, Thanos killed everyone on Earth. Then Frank Castle swore revenge against him and made a deal with the Devil and became the Ghost Rider. 

Then, Galactus came to Earth to seek refuge from Thanos' wave of annihilation and gave Castle Power Cosmic. 

Then he became Galactus' herald and became known as the Cosmic Ghost Rider.

After that, he pledged allegiance with Thanos and became his right-hand man, now known as King Thanos, because neither could kill each other.

King Thanos also kept Hulk as his pet by keeping Hulk chained in his basement.

It's a great comic and is a part of the "Thanos Wins" story arc. You should check it out.