I got a promotional code from google, can't I use it without paying activation fee? I mean I'll be happy even if i get 95$ but I don't want to be charged $5 out of my bank account? Can that be done?
Is there a way I can redeem my coupon without adding credit card?
It sounds like you've already added the credit card to it, but as you have added the promo code, it will use this credit before charging your card for additional adspend. The activation may be taken form the promo as there is nothing on the promo FAQ's page about it.
You can set it so that the campaign finishes before you hit the spend where you're card would be charged.