I was searching after a good alternative for a LED matrix.
The Adafruit matrix is very reliable but it is not the cheapest. On the opposite the Shenzhen and Honkong stuff could have problems with single LEDs (the delivery needs a lot time also).
But the matrix from DIGI-DOT seems to be a good catch.
It can be ordered on amazon:
DIGI-DOT LED matrix
(can also be found on amazon.de)
Of course it works well with the BlinkStick Pro. To test the matrix, I´ve build a small test tool.
The brightness is set to the lowest value by default but can be changed up to 50%. The size of the matrix can also be changed (default is the max value of 8x8). Left click to a pixel sets it to the current color, right click set it back to black.
As a special you can export the code for the SetColors (C#) and set_led_data (Python) bytes to the clipboard. So you can "paint" on your matrix and save it for a later use in your C# or Python code.
Feel free to download and play around with it.