The assumption you're making in the OP simply isn't true. The fact is, these Directs are widely distributed all over social media as things are announced during the stream, and they begin trending on Twitter and pop up all over Facebook and Twitter on all the various media pages from journalists or fan sites.
I know people that pay attention to news from the video game industry, who are not Nintendo fans, and I get texts after Directs throughout the day. Friends of mine who like Sony or Microsoft, haven't owned a Nintendo console since GameCube or N64, and they text me and chide me about news or ask me for clarification on something that was announced.
The word does get out. All the Directs are immediately uploaded to YouTube after the initial broadcast, and news from them is reported just as any other press conference is, by all the major game media outlets.
The Screamapillar is easily identified by its constant screaming—it even screams in its sleep. The Screamapillar is the favorite food of everything, is sexually attracted to fire, and needs constant reassurance or it will die.
