Are you kidding me? For every game I need to:
Buy it (if not free)
Download it
Potentially play a bit
Analyze movement
Reverse engineer sensitivity formula
Measure FOV/reverse engineer it
Analyze potential aims and reverse engineer them
Potential issues with acceleration/smoothing or similar needs to be worked out or worked around and so on
Then it needs to be tested and verified to work as intended with
The calculator
Different DPIs
Different FOVs
Reporting rates
Resolutions
Aspect ratios
Windows settings and so on.
Adding a game can take anywhere from a few hours to many days. It's a bit more work than adding a game name to the calculator... And premium members usually gets priority.