To me, the number of Zcash Users is the key metric by which to judge the success of the MGRC. This can be estimated by app downloads, total searches, flows on on- and off- ramps, etc.
Here’s an example of a data visual MGRC could immediately grant funding towards with clear specifications:
Codebase
In addition to Users/Usage, developers enjoy network effects when accessing a clean, reusable codebase that helps them incorporate shielded money and messages to reach more Zcash users.
I am interested in attaching key performance indicators for the growth of features available in our functional codebase, too.