Looking at the comment section on the Electrek [1] version of this story it looks like the people who will be effected by this WERE TOLD when they got the car that this would be happening. So they knew they were getting these features for free for now and it would be taken away unless they paid for them (a free trial). They could have refused the car right there and waited if they wanted to but preferred to get the car early and enjoyed their free trial. It seems the only people complaining about this are people who aren't effected by it.
"I have a M3 SR, This change is not unexpected and I knew what I was buying... having the additional features for a little while wasn't a problem. I'm glad that they started selling the SR earlier than waiting for the software to be ready." - FS21 [2]
[1] https://electrek.co/2019/06/07/tesla-downgrading-model-3-sta...
[2] https://electrek.co/2019/06/07/tesla-downgrading-model-3-sta...