diff --git a/doc/howto/QUICKSTART.md b/doc/howto/QUICKSTART.md
index da49f4896..ec644bdd3 100644
--- a/doc/howto/QUICKSTART.md
+++ b/doc/howto/QUICKSTART.md
@@ -74,11 +74,17 @@ Every change writes all of its files into one folder under `demo/`, and `FOLDERS
 
 Set it deliberately when you want a run to show one thing. `FOLDERS=1` puts every change in the same place, so the queue serializes the lot and each change speculates on the one before it. A number well above `COUNT` keeps them all apart, so they go out together.
 
-How much speculation that turns into is capped by the queue's **build budget** — how many builds it may have occupying CI at once, counted across every in-flight batch rather than per batch. It defaults to 4 and is set per queue in the provider's `profiles.yaml`:
+How much speculation that turns into is capped by the queue's **build budget** — how many builds it may have occupying CI at once, counted across every in-flight batch rather than per batch. It defaults to 4 and is set per queue in the provider's `profiles.yaml`. The demo also sets **predictor factors** there so speculation ranking revises the scorer's price when a path passes or fails or a batch is merging or cancelling; omitting that block leaves every factor at `1`, which is a no-op and ranks on the scorer alone.
 
 ```yaml
 defaults:
   speculator: {buildBudget: 4}
+  predictor:
+    factors:
+      pathPassed: 10
+      pathFailed: 0.3
+      merging: 12
+      cancelling: 0.1
 
 queues:
   - name: demo-queue
diff --git a/service/submitqueue/demo/provider/fake/profiles.yaml b/service/submitqueue/demo/provider/fake/profiles.yaml
index 5b1fb27b2..b0a620118 100644
--- a/service/submitqueue/demo/provider/fake/profiles.yaml
+++ b/service/submitqueue/demo/provider/fake/profiles.yaml
@@ -22,6 +22,15 @@ defaults:
   # 1 the queue explores one path at a time, and raising it lets it hedge more
   # of the outcomes it is waiting on. Four is the built-in default.
   speculator: {buildBudget: 4}
+  # Example evidence factors from the outcome-predictor RFC. Omitted keys would
+  # stay at 1 and ranking would stay on the scorer alone; writing them out makes
+  # the demo show how path results and batch state revise that price.
+  predictor:
+    factors:
+      pathPassed: 10
+      pathFailed: 0.3
+      merging: 12
+      cancelling: 0.1
 
 queues:
   # The queue `make demo-requests` and `make land` use by default.
diff --git a/service/submitqueue/demo/provider/git/profiles.yaml b/service/submitqueue/demo/provider/git/profiles.yaml
index e47054cc8..8ba87959a 100644
--- a/service/submitqueue/demo/provider/git/profiles.yaml
+++ b/service/submitqueue/demo/provider/git/profiles.yaml
@@ -12,6 +12,14 @@ defaults:
   buildRunner: {type: fake}
   # Serialize conservatively unless a queue says otherwise.
   analyzer: {type: all}
+  # Same example factors as ../fake/profiles.yaml — see that file for why they
+  # are written out rather than left at the neutral default of 1.
+  predictor:
+    factors:
+      pathPassed: 10
+      pathFailed: 0.3
+      merging: 12
+      cancelling: 0.1
 
 queues:
   # The queue `make demo-requests` and `make land` use by default. Serializes
diff --git a/service/submitqueue/demo/provider/github/profiles.yaml b/service/submitqueue/demo/provider/github/profiles.yaml
index 5ef8c34cd..234a15849 100644
--- a/service/submitqueue/demo/provider/github/profiles.yaml
+++ b/service/submitqueue/demo/provider/github/profiles.yaml
@@ -10,6 +10,14 @@ defaults:
   changeProvider: {type: fake}
   buildRunner: {type: fake}
   analyzer: {type: all}
+  # Same example factors as ../fake/profiles.yaml — see that file for why they
+  # are written out rather than left at the neutral default of 1.
+  predictor:
+    factors:
+      pathPassed: 10
+      pathFailed: 0.3
+      merging: 12
+      cancelling: 0.1
 
 queues:
   - name: demo-queue