D&B has got itself a sweet little monopoly business with these DUNS numbers. They charge $299 if you want "Expedited" service otherwise (according to the FAQ) it will take "a MINIMUM of 30 business days for a new D&B DUNS Number to be processed" (emphasis added). I get the sense they just sit on you app until the 30 days are up and no actual work is being done.
They also try to upsell you to one of the many other plans starting at $299. To somewhat soften their touch the basic service is free after all. And the expedited service is free for businesses considering doing government contracting (maybe we should all consider this as we apply to the Apple developer program).
It's relevant if being able to automate the connection allows you to circumvent the checks Apple, et al, have put in place with the DUNS number. I have no clue, so I can't render an opinion.
The shown website development bug does not make me confident about the quality of the rest of their website and data handling in general, so yes, I imply that they are not up to protect the data of their customers - which is the area of expertise of anyone handling massive amount of customer data.
Are you fucking serious?