First, the free conversion only applies to the first $ 1 million of merchant transactions. (gigaom.com)
The authors also worry that bitcoins used in merchant transactions can already be traced back to the exchange where the coins were purchased. (coindesk.com)
As a bulletin from March 28th attached Reddit poster reads, Bank of Montreal (BMO) forbids cryptocurrency merchant transactions with credit or debit cards «effective immediately.» (digitalcoinowner.org)