Modification / Bugfix?
According to the original documentation, as it was some time in 2009, my understanding was that the maximum number of credit cards that could be stored in a contact record was set to five. To keep data transfers to a minimum, the plugin used this “rule of five”. It turns out that either (1) an unannounced change has taken place or (2) I never understood it correctly.
In a recent test with Juan Sutton, we discovered this disparity and the appropriate change was made.