No great product that does not need marketing of some sorts. Bear in mind that marketing and advertising go hand in hand since they both have the same goal of putting the product out there. Therefore, it's imperative to market a product and the budget for Marketing is usually robust as that's bounties, airdrops, and even advertising (banner ads, flashes, etc.) on various web pages come in. Crypto there need marketing to create the necessary awareness and buzz around the project.