eh not really we got them to open their api a few years ago and found they are really lacking a lot of useful stuff but it's a good start.
Bull. From day-1 the Avalons have always been open with full source code available on their git. As a matter of fact, Kano wrote their API.
Now their most recent miners starting with the A10, ja there are less things to tweak and Canaan made it a little harder to find what tweaks you can do but it is still open. Now, that's not to say that the tweaking process can't be improved, after all lots of folks just don't get using a CLI however, ain't no way in hell would I pay for a GUI-based version much less one that given your prior history would also be closed source.