What makes an account eligible for a CSM?

[tomzoom]

In this support post, it is mentioned this feature is "does not apply to accounts which are eligible for a CSM, who will need to contact their CSM or account executive for assistance. ".

I have several accounts and it seems random which have this feature and which don't. Are you able to explain which accounts are eligible for a CSM and which are not?

[Bort]

It would be best to contact your Zoom Account Executive to discuss the requirements for an account acquiring a CSM. 

[tomzoom]

Sorry, I am not looking for a CSM. I just want to know how Zoom (seemingly automatically, as this feature depends upon it) decides whether accounts qualify. Is there any way to find that out? Would be much appreciated!