diff --git a/bbot/core/event/base.py b/bbot/core/event/base.py
index c24601fef..4e962fdbd 100644
--- a/bbot/core/event/base.py
+++ b/bbot/core/event/base.py
@@ -354,12 +354,16 @@ def source(self, source):
         """
         if is_event(source):
             self._source = source
+            hosts_are_same = self.host == source.host
             if source.scope_distance >= 0:
                 new_scope_distance = int(source.scope_distance)
                 # only increment the scope distance if the host changes
-                if self.host != source.host:
+                if not hosts_are_same:
                     new_scope_distance += 1
                 self.scope_distance = new_scope_distance
+            # inherit affiliate tag
+            if hosts_are_same and "affiliate" in source.tags:
+                self.add_tag("affiliate")
         elif not self._dummy:
             log.warning(f"Tried to set invalid source on {self}: (got: {source})")
 
diff --git a/bbot/modules/internal/excavate.py b/bbot/modules/internal/excavate.py
index 95a5a848f..04d8000fa 100644
--- a/bbot/modules/internal/excavate.py
+++ b/bbot/modules/internal/excavate.py
@@ -352,7 +352,8 @@ async def handle_event(self, event):
                     scheme = self.helpers.is_uri(location, return_scheme=True)
                 if scheme in ("http", "https"):
                     if num_redirects <= self.max_redirects:
-                        url_event = self.make_event(location, "URL_UNVERIFIED", event)
+                        # tag redirects to out-of-scope hosts as affiliates
+                        url_event = self.make_event(location, "URL_UNVERIFIED", event, tags="affiliate")
                         if url_event is not None:
                             # inherit web spider distance from parent (don't increment)
                             source_web_spider_distance = getattr(event, "web_spider_distance", 0)
diff --git a/bbot/test/test_step_2/module_tests/test_module_httpx.py b/bbot/test/test_step_2/module_tests/test_module_httpx.py
index fcf134dd3..77f3e98b8 100644
--- a/bbot/test/test_step_2/module_tests/test_module_httpx.py
+++ b/bbot/test/test_step_2/module_tests/test_module_httpx.py
@@ -66,3 +66,32 @@ def check(self, module_test, events):
             [e for e in events if e.type == "URL" and e.data == "http://127.0.0.1:8888/" and "status-301" in e.tags]
         )
         assert 1 == len([e for e in events if e.type == "URL" and e.data == "https://127.0.0.1:9999/"])
+
+
+class TestHTTPX_Redirect(ModuleTestBase):
+    targets = ["http://127.0.0.1:8888"]
+    modules_overrides = ["httpx", "speculate", "excavate"]
+
+    async def setup_after_prep(self, module_test):
+        module_test.httpserver.expect_request("/").respond_with_data(
+            "Redirecting...", status=301, headers={"Location": "http://www.evilcorp.com"}
+        )
+
+    def check(self, module_test, events):
+        assert 1 == len(
+            [e for e in events if e.type == "URL" and e.data == "http://127.0.0.1:8888/" and "status-301" in e.tags]
+        )
+        assert 1 == len(
+            [
+                e
+                for e in events
+                if e.type == "URL_UNVERIFIED" and e.data == "http://www.evilcorp.com/" and "affiliate" in e.tags
+            ]
+        )
+        assert 1 == len(
+            [
+                e
+                for e in events
+                if e.type.startswith("DNS_NAME") and e.data == "www.evilcorp.com" and "affiliate" in e.tags
+            ]
+        )