diff --git a/feps/fep-f1d5.md b/feps/fep-f1d5.md
index 854db58..fe31d81 100644
--- a/feps/fep-f1d5.md
+++ b/feps/fep-f1d5.md
@@ -56,9 +56,20 @@ prescriptive:
 * Lacks an extendable method for identifying and versioning other features, such
   as HTTP Signatures, webfinger, or OAuth. Whereas the specification is very
   strict, the `metadata` is too lax.
-* The `users.usage` is not denormalized, such that implementations can provide
+* The `usage.users` is not denormalized, such that implementations can provide
   custom pairs of `(activity counts, time period in days)` that make sense for
   the software.
+* The `usage.users` assumes that user identity is tied to a specific instance of
+  running software. It is unclear how to count `total` users when user identity
+  is: spread across multiple servers, spread across multiple groups, or present
+  within multiple collections of users. Multiple software instances could each
+  have a resonable claim to counting the user as "using" their software, which
+  globally results users being counted more than once.
+* The `usage.users` activity counts likewise assume that user identity is tied
+  to a specific instance of running software. For the same reasons above, where
+  the `total` user counts may result in duplicate counts of the same user across
+  all software running, the activity counts `activeHalfYear` and `activeMonth`
+  may also result in a globally inflated count.
 * The `activeHalfyear` and `activeMonth` are ill-named properties for describing
   the time periods of 180 days and 30 days, respectively. A "half of one year"
   is 180 days 0% of the time and roughly 182.5 days only 75% of the time. A