Remove / migrate away from legacy Connect account types

[chrisjsimpson]

Is your feature request related to a problem? Please describe.

Currently Subscribie makes use of the (now) legacy Stripe Connect acount types (aka 'Express') accounts for each subscribie shop owner. This api, by default moves the onus of fees in a direction not taken advantage of at the platform layer, causing Subscribie to be the payer of some elements of account fees- since these were never monitised, instead absorbed. The original intentino of the Stripe Connect apis was to allow Platform account to create their own monitisation strategy around these account types, however (presumebly*) this largley didn't happen and since thay time Stripe Connect Express account types (and others) are now considered legacy. The impact on billing remains the same issue.

• See/read https://docs.stripe.com/connect/direct-charges-fee-payer-behavior?locale=en-GB#application_custom-or-application_express

Describe the solution you'd like

Read / gather context/implications of switching to the replacement of Stripe Connect Express account types, migration path and impect to current Shop Owners and platform. See

• https://docs.stripe.com/connect/accounts?locale=en-GB
• https://docs.stripe.com/connect/migrate-to-controller-properties
  • Especially https://docs.stripe.com/connect/migrate-to-controller-properties#:~:text=Updating%20your%20integration%20involves%3A

Describe alternatives you've considered
Stay as is, absorb.
Additional context

"Billing - Usage Fee"

Let's take for example "Billing - Usage Fee"s

• https://www.reddit.com/r/stripe/comments/1kwydyp/what_is_the_billing_usage_fee_charge_im_seeing_on/
• https://www.reddit.com/r/stripe/comments/1l867q8/balance_all_activity_how_is_the_billing_usage_fee/

Invoice generation fees

• https://www.reddit.com/r/stripe/comments/1ioss7q/does_stripe_charge_extra_for_every_invoice_it/
• https://www.reddit.com/r/stripe/comments/1igzvvu/removed_by_moderator/