So these might be great ways to make a little bit of money, but they don't really create value (except for the theme). Creating a successful startup should be more about creating value then making money, if you create value the money will come. When you think about success do you define it as money or building something people use and love (and also makes you money). If you want to make a cheap buck there are plenty of ways to do it without providing value. Go create a trash blog on a popular keyword, become a domain squatter, etc. But I want to create value and build something people will use and enjoy using.
Agreed - these ideas are not a startup - they don't create real value as a company. However the idea of making passive income is very attractive to many programmers, and creates an opportunity to have time to work on something big.
