Android : revmob ads only showing war of games

I am trying to get targeted ads to work on revmob android but I only get to see game of war ads.

Here is the code

revmob = RevMob.start(this); // RevMob App ID configured in the AndroidManifest.xml file
List<String> userinterests = Arrays.asList("nutrition");
revmob.setUserInterests(userinterests);
RevMobBanner banner = revmob.createBanner(this);