And along with those changes of interests, marketing is changed as well. 5 years later, marketing will be different. 5 years ago, marketing was different. Some changes are dramatic while others are minor. Companies and big name industries are spending millions of dollars on marketing campaigns that don’t work the way they used to.
Other than Super Bowl commercials, TV advertising isn’t as effective as it used to be. Getting your own following on social networks, products, and a blog is the way to market nowadays (although that can change too).
Marketing etiquette is inconsistent because interests change. Commercials might have been really cool to look at when someone watched TV for the first time. In the 1950’s, commercials must have been really cool since the television wasn’t that old. Now mobile advertising is the way to go although I doubt mobile advertising will be the way to go forever.
Interests change, and when those interests change, the rules of marketing change. By paying attention to those changes, you will be able to see the rules of marketing change before everyone else.