Earlier quoted context omitted.
$8/mo is genuinely a lot of money for this kind of infrastructure, even if there are developers and servers to be paid for. Assume that there are only 100,000 users. This would imply $9.6M per year in revenue to cover infrastructure and dev salaries for a system that handles ~2 queries/day/customer! And 100,000 is a very small number. Presumably Toyota has millions of customers. If you think that's reasonable, consid…
$8 is a lot but to be fair, Disney+ is almost certainly losing money per subscriber. $8 in this case also has to cover the cost of the 4G connection, which likely is in the $1 to $2 range.
"Key fob remote start has nothing to do with an app, nor does the car or the fob communicate with any servers managed by Toyota."
It sounds like this $8/month charge is for the allowing you to use remote start locally presumably over RF.