Really? They can't join a Barclaycard with a checking account because the former was opened through the internet and not from the store (Their words.) Plus they don't allow installing the Barclay's mobile app if you are running Lineage OS and openGapps despite passing safetyNet. Last but not least the web log in process for Barclaycard is security theatre. Split into 2+ steps but all knowledge based, ie still only 1 factor but annoying to use.