I probably will bet this will have to change - mainly due to EU regulations.
Firstly, €/£10 added to the fare - which can't be changed as it is needed must be included in the fare price; you see first.
Secondly, it is going to make the tickets more expensive; and for "75% of passengers" - adding €/£10 is going to make the fares less attractive.
Thirdly, the charge will be waived for on-line/0 bags customers. This allows them to continue advertising £5 seats etc and for customers to be encouraged take no carry on bags.
Concluding, I would be very surprised to see the new charge brought in. I suspect that it was another....
PR stunt.
Just what I am thinking, adding €10 onto the ticket per person is not going to sell them any more tickets.
Nikolai.