The Wall Street Journal has posted a fun video about "crap apps," those apps the are entertaining — and useless. I've posted about some of them. The irony, which isn't of course lost on the Wall Street Journal, is that these apps often make a lot more money than the serious apps. Among others, the video interviews Corey Johnson, whose crap app Mustache has made some $10,000, even though he only spent a few hours on it, and whose serious apps have sold little. He says he'd prefer to do serious apps, but the money is in -- crap.