Originally Posted by
JDiver
Be aware: if you acquire a magazine subscription with miles, according to others in another thread, you will be asked for a credit card number - which will then be used to "perpetually" auto-renew the subscription at the current renewal price.
If you have a credit card number with a "virtual card number" (one time use) you may want to use that if you are asked for a credit card number.
thanks. never knew about it.
also, after some quick Googling research, it's good to see that this virtual card number is free service from Citi.