Are there subscriptions in the beta US?

I just got my curve app in the US (waiting on the physical card). I added 5 cards to the app already. Is there any subscription process in the US at this time? I see in the EU the “blue” card has a 2 payment card limit. Then you need to start paying a monthly fee.

I wasn’t prompted for any fee with 5 cards. I don’t want to pay a fee either. If there are no subscriptions right now, which tier do we currently have as far as the “back in time” feature, etc.