CS50 on EdX issues ACE credits?!

[Robson]

Some educational institutions or organizations may offer you credit based on edX verified certificates. Students receive verified certificates after they earn a passing grade in a course that offers these certificates. If you're currently associated with a college or organization, contact that organization directly to find out about credit options for verified certificates.

Source: https://support.edx.org/hc/en-us/article...-my-course

So it looks like there may or may not be some obscure 'credit options for verified certificates' at unspecified educational institutions. 

Might be worth asking TESU about this, if anyone is in touch with them.
It looks like they're working closely with edX and doing all the credit stuff for the MicroBachelors courses. Maybe they can transcribe the ACE recommended certs too.

All MicroBachelors programs are reviewed and awarded credit through our credit partner institution, Thomas Edison State University (TESU). TESU may not be the institution providing the course content for your given program, but they are a leading innovative university to provide a hassle-free process without fees. Some MicroBachelors programs may have the option of earning credit through the institution providing the course content as well. See details on the individual program page for details.

https://www.tesu.edu/degree-completion/edx-credit

The list of EdX programs don't list CS50, although they do list NYU CS Fundamentals and a few other courses. If you're part of the Verizon program you may want to check those out. Apparently TESU will transcript these for free.