Complex sentence: In the beginning of 2005 the Danish banks introduced a fee for using the Dankort of 50 øre ($0.07) per transaction, prompting massive protests from Danish politicians (right in the middle of a general election campaign), store owners and card holders.
Split into simpler sentences: In the beginning of 2005 the Danish banks introduced a 50 øre per transaction fee for using a Dankort card. This was commented and asked by Danish politicians (right in the middle of a general election campaign), merchants, and card holders.