Great idea. I think this is important for the Bitcoin developer space.
I see the prices, which are very reasonable, but I'm a bit surprised that they're not in BTC. Also, are the study guides included in those prices and are they available through you? Are there fees to retake the test if you don't pass the first time?
I'm working on a startup that verifies information people assert about themselves, including educational and certification achievements. Are you planning on building a page so third parties and HR employees can enter a certificate number to verify that it was issued to an individual?
If so, make sure the certificate numbers aren't sequentially issued so data scraping isn't a concern.
Considering your industry focus, you should consider publishing proof of people getting their certification on the blockchain itself
Edit:
For curiosity sake, I went through the signup process. They do accept BTC, even though the homepage has the price denominated in Canadian Dollars. The signup process is pretty well done.
The test itself seems to be outsourced through proprofs.com
There are no links to study materials or a sample test, so I have no idea if I'll pass the test or not. It doesn't appear that you can retest. That will turn off a lot of potential applicants because they won't know if they're wasting almost 0.1 BTC on a certification that might ask them something beyond their skill set.
I'll take the test in a few minutes and let everyone know what the process is like.
There is a place to look up a certificate, but unless I'm mistaken, you have to create an account and log in to use that feature.