As a recent new owner of a Fenix 5+, I received a marketing email from Garmin a couple of days ago encouraging me to start using Garmin Pay. In that email they were promoting a financial service called Boon. Boon is part of a firm called Wirecard, and there is also a "Mastercard by Wirecard" card included on Garmin's list of participating banks.
You should know that Wirecard has ecently been involved in a financial scandal where €1.9billion disappeared from their accounts (just Google for news about Wirecard), and has filed for insolvency. Regulators have imposed restrictions on the firm's activities. As such, I'm surprised that Garmin are still promoting this firm's services.
Just thought I'd mention this in case anyone was thinking of opening an account with Wirecard or Boon, as I was off the back of that Garmin marketing email!