It depends, marketing is good, but I wouldn't totally disregard the natural efforts of sales of good products and services, it's obvious everywhere. Once you can solve problems, give people what they want and you do it at best, it will naturally promote itself. But this is not the case in a highly competitive market, which is why marketing is very important. Also, there are situations where the person can't be easily discovered, the market will bring out the popularity, at least for prospective customers to feel the taste of what you can offer, it's from there they will bring more customers to feel the good products.

What I'm saying is that both good service/products and marketing have to work hand-in-hand for the success of the business. If the marketing is good and the product/service is bad, it's only a matter of time before this would boomerang.

While digital products and services need more marketing before they would achieve their goal, the cost of doing this could be so scary that it would discourage many.