And at one time Porsche progits were higher than their revenue (look it up, that was caused by their VW shares exploding in value). Ferrari is more profitable than, say, Hyundai. Different market segmentd have different profit margins, and Toyota actually can build cars with retail prices below 30k.

Do they still make a large portion of profit from selling carbon credits though?

No. In their latest filing[1], automotive regulatory credits are around 1% of revenue.

1. https://www.sec.gov/ix?doc=/Archives/edgar/data/1318605/0000...

Revenue =|= profits. Now, if you are interested, devide what ever that revenue was by Tesla's profits. Because those credits have a zero cost behind them. And those credits will go away with every EV those other brands build and sell.

If you look at the SEC filing it's 8% of profits. Though Tesla isn't trying to be particularly profitable right now. They've been spending tons of money on new factories so they can scale up production.

Credits aren't pure profit. You have to build and deliver a car to get them, so the 1% number of the parent comment is much more relevant than your 8% number.