Remember, even if you've been exposed to something in the past, it doesn't mean you know what it is. I clicked on the article on the HN page, by reading the title, and didn't see the domain until I went to click on the back button. I can't say that I didn't have any inkling that it was a game, and whether it was from the mine craft like picture or the url I can't say (though I don't know for sure that humble bundle is only games.)

IF people are tweeting this page, how many people who see that tweet are likely to follow it and have never heard of Humble Bundle before? So, they'd know even less than I would...