Good point!almost 20% of their automotive gross profit came from regulatory credits
- Automotive regulatory credits: $890 m
General Motors (GM) will pay $146 million in penalties after an investigation found 5.9 million of the company’s vehicles put out excess greenhouse gas emissions,
So I have no problem with Tesla selling emissions credits. Let the air polluters pay for their stink. I'm old enough to remember:

Air pollution that in 1972 was worse than the Marine gas hut training . . . and no exit.
Bob Wilson