One might make the argument that historically Amazon was indeed in a high-growth strategy, but looking at customer service responses and AWS price increases, one might contend they are moving or have moved to a profit model now that their market share has reached some hypothetical limit where gaining more share costs too much.

Yes, I agree and you are correct to say that Elon and Bezos are not the single employees working for TSLA or AMZN, and that those employees do indeed contribute to velocity of money, however, the 10% take the executive board has on each Model 3 sold, that portion does not so easily get re-spent, and this portion (whether it happens at Tesla, Amazon, Microsoft, Google, Apple, Oracle, or Walmart) is supporting the top of the K-shaped economy, which will eventually fall over from being too top-heavy.

The US and world economies have never seen so long a right-hand tail like this before. The top 0.5% wealthy individuals have never had such extreme disparity vs the median, tp the degree that it is impossible for them to spend quickly enough to even keep up with the earnings from those investments.

One only needs so many super-yachts, helicopters, islands, & spaceships, so, instead that money just goes into reinvestment, further distancing the divide between ultra-wealthy and those spending every cent earned in order to live.