Does the 'Added to cart' event work yet?

That event works, I'm using it myself, you need to add some condition and action successors to have any effect.

The event has the added entity automatically.

I'm currently working on the documentation for tokens. The WIP is currently under review, but you may find this already useful: https://ecaguide.org/MR-77/eca/concepts/tokens/ It should explain how you can use the tokens in your model. If anything is missing in that documentation, happy to improve that.

@griz have you had a chance to test this again?