This holds true for my API at https://openexchangerates.org, which is to its core a B2D service - I built it to service my own needs - whereas most of the key players in the industry seem to be aimed at business people.
The truth about many APIs is that it's the developers who are generally the ones searching for the solution they need, who then ask for finance dept or bosses to make the payment (this is true for at least 1/3rd of my customer base, in my experience - developer signs up, finance does the payment).
It's also developers who spread the word more about services they use, link back to things, write tutorials etc (where most of my traffic comes from).
Having said that, take with a pinch of salt - this is only from my personal experience with my business and may not hold up for everybody/anybody else!
The truth about many APIs is that it's the developers who are generally the ones searching for the solution they need, who then ask for finance dept or bosses to make the payment (this is true for at least 1/3rd of my customer base, in my experience - developer signs up, finance does the payment).
It's also developers who spread the word more about services they use, link back to things, write tutorials etc (where most of my traffic comes from).
Having said that, take with a pinch of salt - this is only from my personal experience with my business and may not hold up for everybody/anybody else!