Slightly improve spam filtering

docassemble/GithubFeedbackForm/github_issue.py

@@ -120,8 +120,21 @@ def feedback_link(
 def is_likely_spam(body: Optional[str]) -> bool:
     if not body:
         return False
+    body = body.lower()
     if any(
-        [url in body for url in ["boostleadgeneration.com/", "jumboleadmagnet.com/"]]
+        [url in body for url in {"leadgeneration.com", "leadmagnet.com"}]
+    ):
+        return True
+    if any(
+        [keyword 
+         in body
+         for keyword in 
+            {"free trial", "unsubscribe", "web visitors into leads",
+    "international long distance calling", "100 times more effective",
+    "web visitors", "lead feature", "web lead", "lead generation"
+            }
+        ]
+
     ):
         return True
     return False