Clarify "case as a group"

[tmciver]

In the README there is the following sentence:

An application of this feature is to throw a resource open to all logged on users for a specific amount of time, accumulate the list of those who case as a group, and then later restrict access to that group, to prevent spam.

The question here is around the use of the word "case". Is it a typo or meant in the sense of "to examine or survey"? If the latter, I would suggest changing this wording as it sounds strange to my ear, er, looks strange to my eye. :)

[dmitrizagidulin]

+1, I also don't understand that sentence.