FRAUDS or SCAMS have always been present in our lives with regular mail, with contracts of paper and shaking hands or we can still receive some tempting invitation of a millionaire widow in X country, all of them use marketing, cause marketing is just the name of the action of communicating something. Crypto is a huge improvement in how things might be done and distributed (Steemit is a really good example). It is your own responsibility to investigate and educate yourself ir you are going to invest any money (or time) in any kind of business, it could be a restaurant, a clothes shop, an IPO or an ICO.
Again... marketing is just a way for communicating the benefits we believe our products have or who we are. NOT MORE NOT LESS