While Tesla does have a $10/m plan, you still get basic Internet without paying for it... Tesla's free is better than any other company's paid subscription.
That said, $10 is far too much for what it is, should be $5.
A Tesla costs $80k and lasts 10 years. Why are you saying $1200 for internet is too much and $600 isn’t?
Why do they even bother charging - just bundle it in with the headline price. It’s a tiny portion of the revenue, nobody is going to think “oh that $87,345 Tesla is too much I’ll go for the $86,145 one”