1. At its peak in 2000, Blockbuster made $800 million from one thing customers absolutely HATED: late fees . If you're too young to remember, by the late '90s and early '00s, the video rental giant dominated the home entertainment industry, with thousands of stores worldwide and millions of customers renting VHS tapes and DVDs each week. But if customers forgot to return a movie on time, the penalties added up fast, and those charges became a huge part of the company's business model. According to reports, late fees accounted for about 16% of Blockbuster's revenue in 2000. Though it brought in hundreds of millions of dollars annually, the company announced in 2004 that it would eliminate late fees in an effort to compete with Netflix. However, they had to go back to charging late fees because customers would keep popular DVDs for long periods of time.…