Tesla recently started billing $10/mo for internet service[1] (might be at a break-even price). They've also started to release in-app DLC ($2k) that makes your car accelerate quicker[2]
I did not purchase the GM connectivity because it didn't provide any value, the features were lame or useless and it was no loss not having them after the trial period ended.
The Tesla connectivity is really part of the whole car experience and I would probably be willing to pay quite a bit more, I was surprised by how reasonable the price was.
[1] https://www.tesla.com/support/connectivity
[2] https://electrek.co/2019/12/18/tesla-acceleration-boost-upgr...