How to determine if a user has a Trello subscription from within a PowerUp

Is there any reliable way to determine if a user has a subscription to Trello from within a powerup?

I would like to use that information to change the behavior a little bit so for example I can know if custom fields is available and if they have access to additional board view styles.

From inside of a Power-Up, no - not as far as I’m aware.

I think that this is going to be determined on the board level. I can be a user on a paid workspace and on a board that is not in that workspace and so won’t have access to those paid features. I’ve asked for clarification, but I have a sneaking suspicion but either isPremium or isBc returned in the array for premiumFeatures is going to the thing that determines whether Custom Fields and Views are available.