Entrepreneurs, investors, bloggers, reviewers, marketers… they always talk about how apps and services should enlighten people, but can they break your heart? They sure can! — Now, here’s a story. No names, because I’m not here to criticize, just to tell that story about a sad, sad moment. OK, not that sad, but sad. There’s a service I’ve been using for a few years now, which I happily paid for because I was satisfied. Again, no…