> even if the client had passed a value it would have still done exactly the same thing, as the value of "v" (or anything from the request) is not used in that block

If they passed in any value, they would have entered the block and returned early with the results of FetchPrefixesPendingDeletion.

From the post:

> this was implemented as part of a regularly running sub-task that checks for BYOIP prefixes that should be removed, and then removes them.

They expected to drop into the block of code above, but since they didn't, they returned all routes.