diff --git a/UsefulAdsFilter/sections/usefulads.txt b/UsefulAdsFilter/sections/usefulads.txt
index 74de3d2b227..0c545059e8e 100644
--- a/UsefulAdsFilter/sections/usefulads.txt
+++ b/UsefulAdsFilter/sections/usefulads.txt
@@ -133,7 +133,9 @@ suchmaschine.com#@##ypa-top-wrap > iframe[src^="http://partnerads.ysm.yahoo.com/
 comss.ru#@##main > .flat td[style*="180px"] > .block
 comss.ru#@##main > .flat td[style*="260px"] > .av:nth-child(2)
 comss.ru#@##main > .flat td[style*="260px"] > .top:first-child
-! Nadavi widget
+! Nadavi widget seems to be relevant and can be useful in these cases:
+! https://tech-choice.net/smartfony-huawei-2018/ http://allssd.ru/obzor-amd-ryzen-5-2400g-geil-evo-x/
+! TODO: Keep an eye on the uses of their widget and make sure it is not misused.
 @@/gb.php?idb_=$domain=e-katalog.ru|ek.ua|nadavi.ru|m.ua
 @@||info.price.nadavi.*/*.php?p4g_api_type_=iframe$third-party
 ! https://github.com/AdguardTeam/AdguardFilters/issues/10730 - unblocking premium banner