Two more questions.
I signed up for bahn.bonus, but the website said that I won't receive my card for up to 9 days. Can I get retroactive credit?
Also, is there a way to upfare a ticket?
I wasn't sure how long the 29EUR sale was going to last, so I bought a 2nd class ticket. The spread on first was too great, now of course 1st is back down to 39EUR. I'm going to guess that I would have to pay 15EUR to exchange the ticket, lose the 4,50EUR that I paid for the seat booking fee, and pay the 10EUR on top.