More specifically, the BoA and CitiBank virtual CC numbers can be used for one Merchant only (the first one charged, rather than one transaction) and you set th

More specifically, the BoA and CitiBank virtual CC numbers can be used for one Merchant only (the first one charged, rather than one transaction) and you set the max dollar limit and expiration for both options. The 2nd option for reoccurring, just helps you do the math for reoccurring so you have the right total and expiration.