No. The only credit card "fee" results from charging the Entropay Visa. They take 4.95%. Opodo limits the use to 1 booking per 3 month (a big no no in the eyes of customer rights). Initially their system could be bypassed by using an iPad (or by having your browser simulate an iPad - which most internet browser offer to developers to test their mobile websites).

Now their system is much more vigorously and blocks not only my Entropay card, but also the Entropay card of my SO (Another big no no in the eyes of consumer rights).