diff --git a/maigret/resources/data.json b/maigret/resources/data.json
index 9798311..a0205bc 100644
--- a/maigret/resources/data.json
+++ b/maigret/resources/data.json
@@ -3003,6 +3003,9 @@
                 "news"
             ],
             "checkType": "message",
+            "presenseStrs": [
+                "karma:"
+            ],
             "absenceStrs": [
                 "No such user"
             ],
@@ -5601,7 +5604,13 @@
                 "cz"
             ],
             "regexCheck": "^[^\\.]+$",
-            "checkType": "status_code",
+            "checkType": "message",
+            "presenseStrs": [
+                "\"user\":{\"username\":\""
+            ],
+            "absenceStrs": [
+                "Uživatel neexistuje"
+            ],
             "urlMain": "https://www.rajce.idnes.cz/",
             "url": "https://{username}.rajce.idnes.cz/",
             "usernameClaimed": "blue",
diff --git a/maigret/resources/db_meta.json b/maigret/resources/db_meta.json
index f2e6b3c..20e3c29 100644
--- a/maigret/resources/db_meta.json
+++ b/maigret/resources/db_meta.json
@@ -1,8 +1,8 @@
 {
     "version": 1,
-    "updated_at": "2026-06-14T19:47:07Z",
+    "updated_at": "2026-06-18T12:23:06Z",
     "sites_count": 3161,
     "min_maigret_version": "0.6.1",
-    "data_sha256": "d1e339a7d7839b6e4fe2ff0440138f5ce8a5d1da8ff0a4be9b936368756315c0",
+    "data_sha256": "0da1607d2d82e27a875daec64ec13fed37e47e29b7c236b64e423778d66674d1",
     "data_url": "https://raw.githubusercontent.com/soxoj/maigret/main/maigret/resources/data.json"
 }
\ No newline at end of file
diff --git a/sites.md b/sites.md
index 9426295..c416ea7 100644
--- a/sites.md
+++ b/sites.md
@@ -3165,16 +3165,16 @@ Rank data fetched from Majestic Million by domains.
 1. ![](https://www.google.com/s2/favicons?domain=https://faceit.com/) [Faceit (https://faceit.com/)](https://faceit.com/)*: top 100M, gaming*
 1. ![](https://www.google.com/s2/favicons?domain=https://hey.xyz/) [Hey (https://hey.xyz/)](https://hey.xyz/)*: top 100M, nft, social*
 
-The list was updated at (2026-06-10)
+The list was updated at (2026-06-18)
 ## Statistics
 
 Enabled/total sites: 2517/3161 = 79.63%
 
-Incomplete message checks: 308/2517 = 12.24% (false positive risks)
+Incomplete message checks: 307/2517 = 12.2% (false positive risks)
 
-Status code checks: 629/2517 = 24.99% (false positive risks)
+Status code checks: 628/2517 = 24.95% (false positive risks)
 
-False positive risk (total): 37.23%
+False positive risk (total): 37.15%
 
 Sites with probing: 500px, Armchairgm, BinarySearch (disabled), BleachFandom, Bluesky, BongaCams, Boosty, BuyMeACoffee, Calendly, Cent, Chess, Code Sandbox (disabled), Code Snippet Wiki, DailyMotion, Discord, Diskusjon.no, Disqus, Docker Hub, Duolingo, Faceit, FandomCommunityCentral, GitHub, GitLab, Google Plus (archived), Gravatar, HackTheBox, Hackerrank, Hashnode, Hey, Holopin, Imgur, Instagram, Issuu, Keybase, Kick, Kvinneguiden, LeetCode, Lesswrong, Livejasmin, LocalCryptos (disabled), Matrix, Medium, MicrosoftLearn, MixCloud, Monkeytype, NPM, Niftygateway, Omg.lol, OnlyFans, Paragraph, Picsart, Plurk, Polarsteps, Rarible, Reddit, Reddit Search (Pushshift) (disabled), Revolut.me, RoyalCams, Scratch, Soop, SportsTracker, Spotify, StackOverflow, Substack, TAP'D, Topcoder, Trello, Twitch, Twitter, Twitter Shadowban (disabled), UnstoppableDomains, Vimeo, Vivino, Warframe Market, Warpcast, Weibo, Wikipedia, Yapisal (disabled), YouNow, en.brickimedia.org, forums.grandstream.com, nightbot, notabug.org, qiwi.me (disabled)
 
diff --git a/tests/test_checking.py b/tests/test_checking.py
index f7db4f7..615024d 100644
--- a/tests/test_checking.py
+++ b/tests/test_checking.py
@@ -374,6 +374,58 @@ def test_process_site_result_message_available_by_absence():
     assert out["status"].status == MaigretCheckStatus.AVAILABLE
 
 
+def _process_default_site(site, body, status_code=200, username="random"):
+    info = {
+        "username": username,
+        "parsing_enabled": False,
+        "url_user": site.url.replace("{username}", username),
+    }
+    return process_site_result((body, status_code, None), Mock(), Mock(), info, site)
+
+
+def test_hackernews_requires_profile_marker(default_db):
+    site = default_db.sites_dict["HackerNews"]
+
+    claimed = _process_default_site(
+        site,
+        "<tr><td>user:</td><td>blue</td></tr>"
+        "<tr><td>created:</td><td>January 1, 2020</td></tr>"
+        "<tr><td>karma:</td><td>1</td></tr>",
+        username="blue",
+    )
+    missing = _process_default_site(site, "No such user.", username="random-hn-user")
+    generic = _process_default_site(site, "Sorry.", username="random-hn-user")
+
+    assert claimed["status"].status == MaigretCheckStatus.CLAIMED
+    assert missing["status"].status == MaigretCheckStatus.AVAILABLE
+    assert generic["status"].status == MaigretCheckStatus.AVAILABLE
+
+
+def test_rajce_requires_profile_marker(default_db):
+    site = default_db.sites_dict["Rajce.net"]
+
+    claimed = _process_default_site(
+        site,
+        '<script>var settings = {"user":{"username":"blue"}}</script>',
+        username="blue",
+    )
+    missing = _process_default_site(
+        site,
+        "<title>Uživatel neexistuje</title>",
+        status_code=410,
+        username="random-rajce-user",
+    )
+    generic = _process_default_site(
+        site,
+        "<html><title>Rajce.net</title></html>",
+        username="random-rajce-user",
+    )
+
+    assert claimed["status"].status == MaigretCheckStatus.CLAIMED
+    assert missing["status"].status == MaigretCheckStatus.AVAILABLE
+    assert generic["status"].status == MaigretCheckStatus.AVAILABLE
+
+
 def test_process_site_result_with_error_is_unknown():
     site = _make_site({"checkType": "status_code"})
     info = {"username": "a", "parsing_enabled": False, "url_user": "https://x/a"}