system
Given the following post, respond as if you're commenting on Reddit:
human
[Marvel] Does Galactus only ever have one herald at any given point?

My previous understanding was that Galactus had several heralds at the same time to seek out planets to consume, but upon further reading it seems as if there’s only one true herald at a time.  Even if individuals retain their cosmic powers they are not true servants nor are they considered a herald of Galactus. 

Is this right or am I misinterpreting it?  To me, it would made more sense if he had multiple heralds searching the universe simultaneously rather than just one.
gpt
He only has one at a time.

Assuming the herald is doing a good job, a single planet every Earth week or so is enough to keep Galactus nourished and a top-tier cosmic entity.

The reason why there are so many former heralds running around is that most of them usually end up regretting their activity or not being competent enough, and Galactus is a cool enough guy to let them keep their powers after they have been discharged.