Currently, if the site is connected to Stripe with the Default account via the API key method (available to premium Stripe add-on users), the Text-to-Give integration does not work, but bails on "Stripe account not connected"
Here's the tested and confirmed scenarios:
Account 1 is connected via API keys
Account 2 is connected via Blue Connect button
  1. Connected only account 1: does
    not
    work.
  2. Connected to both accounts, with 1 as default: does
    not
    work.
  3. Connected to both accounts with account 2 as global default, but overridden at form level by account 1: does
    not
    work.
  4. Connected to both accounts with account 1 as global default, but overridden at form level by account 2:
    does
    work.