Originally Posted by
Erikderek_SWE
[Thinking out loud]; makes more sense to opt in since it's only an overhead cost of $1 day + toll and the convenience of not have to stop and pay toll.
You don't have to opt-in as such - simply going through a toll that gets charged to Avis results in you being charged.
Whether it's a good deal or not depends entirely on how much you use it. For example, in the SF Bay area, a lot of tourists will rent a car for a week or more, but only use a single toll - the Golden Gate Bridge (the only non-cash toll road in the bay area), so they end up paying $8 for the toll, and ~$20 for the fee, which is obviously fairly significant.
After being sued over this more than once, Hertz have changed their pricing to only charge on the (calendar) days that you actually use a toll, but got rid of the cap. Good for the occasional toll users, less good for the long-rental-tolls-every-day renters.