One of the issues is that sales generated by a salesperson are a lot easier to attribute than sales generated by marketing. Let's say that, as a content marketer, I write an article for a client's blog that is widely shared. The article increases mindshare for the product, helps to establish the brand, and makes a material difference to the number of sales over the next year. But how does the business attribute those sales to me so that I get my commission? Many of those sales will not be from people clicking a CTA on the blog article, but from people who remember the brand and make a purchase weeks or months later. It's not even as easy as it seems to attribute sales to PPC or other forms of advertising.

Developers building products that noone uses is the status quo.

There are likely hundreds of thousands, or millions of developer built apps with no users.

Just because a product was built does not meet the only thing left is marketing.

In fact, I would rather have great marketing than a great product.

A lousy product with revenue can be iterated on more quickly than a great product with no revenue.