That's not how revenue is determined. Revenue is determined by, well, revenue.
You can lose market share and increase revenue if the market is growing fast enough.
If you measure market share by units moved (as many markets are measured), you can raise prices and increase revenue despite lower unit sales and lost market share.
You could technically guess it that way, in an incredibly simplified market if you didn’t have the actual number available to you. The car market isn’t incredibly simplified, and we do have the revenue number.
The numbers cited in the article are units sold. Tesla has 38% of 128k cars sold. Now tell me what the Tesla revenue was using your method?
See why serious people just look at what revenue was to determine what revenue was? It’s not a “bottom up” approach, it’s a “look at that reported and audited number and tell me what it is” approach.
Did you figure out what the revenue is yet, I'm super curious about how close the "top down" approach is going to be to reality. Don't forget that Tesla has revenue from non car products!
You can lose market share and increase revenue if the market is growing fast enough.
If you measure market share by units moved (as many markets are measured), you can raise prices and increase revenue despite lower unit sales and lost market share.