It was actually possible to use per-seat pricing with Stripe before this without creating numerous plans. You'd just have to do most of the work in the applicat

It was actually possible to use per-seat pricing with Stripe before this without creating numerous plans. You'd just have to do most of the work in the application layer, adding/removing individual charges to an invoice when seats are added/removed, and calculating the pro-rating charges on your own. I did this for TaskforceApp.com over a year ago.