Notice how your initial claim was "compensation is only possible via snail mail" and is now "people who don't use the website or app can't use the website or app to file a claim".
The important difference is that the latter claim can only strenuously support the implication of incompetence and obstruction.
Just by the way, it has always and is still possible to go to the service center and instantly get compensated. So even when you don't have a bahn.de account you never need to mail anything.
cedilla, from my very fist example I talked about cases where your solution, even if it existed, was completely useless and despite your best efforts to back up your counterpoints you still came up short. And you continued to carry water for a company despite now knowing that there are so many cases that consist of abusing intentionally arcane and archaic systems that create just enough friction to convince the person to drop it. Are telling us that a company which has been using ML (for some definition of that) since years to do predictive maintenance of their trains can't transition from a paper form in snail mail to digital scans and an email address?
Furthermore their mistakes are absolutely not punishable, as confirmed with a lawyer. When they repeatedly make a mistake in the assessment of those paper forms they don't get referred for prosecution despite each mistake costing the customer hundreds of EUR in unrecovered ticket expenses. So when they "mistakenly" assessed 3 times (!!!) that they don't need to give me back hundreds of EUR it can no longer be accidental. That's 10 times more money than an unpaid bus fine (and many, many times more than a few bus tickets) and not only do they do their best to wiggle out of meeting their legal obligation, they are also not pushed at the end of the process. Unlike the poor lady in the article who went to prison for riding the bus without a ticket (10-15EUR in total!).
The excuse that it's not abuse unless all the customers are abused is like saying it's not rape if you just force the tip in. You are absolutely not posting in good faith at this point. I don't know if you just can't get the point, if you can't accept being wrong, or have some hidden agenda, but defending such abuse is inexcusable especially when faced with the evidence that the very same companies who abuse their customers like this have 0 tolerance for being abused by their customers. And Nazi-era remnants of the society and legal system allow a person to go to jail for unpaid bus ticket but completely shield the bus company from any repercussions from unpaid compensations to a person.