[1] https://translate.google.com/translate?sl=auto&tl=en&u=https...
[1] https://translate.google.com/translate?sl=auto&tl=en&u=https...
That's actually the explanation. 10 years ago I ran a small project and they were the only Payment Service Provider that agreed to work with us. At that time at least in Germany there were no Paypal and Stripe to directly process Credit Cards etc. for small websites. IIRC their fees - especially for refunds - were much higher than those of competitors. Refund rates are normally in the sub percentage but they would accept higher than usual refund rates without cancelling the account. It's easy to start a business in an area where there is a vacuum of competitors.
(FWIW I think cancelling the account with them to switch over to Paypal took almost 2 years...)
Huge number of chargebacks. A previous employer of mine had a subsidiary that handled premium rate SMS and phone call billing, a lot of which was adult services. You'd see a huge amount of contested charges, for reasons such as:
* Buyer's remorse (get drunk, wake up the next day, realise you spent $500 on porn)
* Unsupervised minor - your kid "borrows" your credit card for some online "research"
* Outright fraud - stolen cards, etc.
This isn't a case of a few errors and lack of a little due diligence.
That kind of stuff is pretty common though, Elon Musk has about 15 billion dollars, 100x that amount (!), of his Tesla stocks posted as collateral for personal loans: https://www.theverge.com/2020/5/8/21252487/elon-musk-persona...
And Deutsche Bank is a big player in this kind of business, remember their involvement with Trump?
https://aboutus.ft.com/en-gb/announcements/ft-statement-on-w...
"Wirecard's origins date back to 1999, when its Berlin-based predecessor InfoGenie was founded. Wirecard listed its shares on Frankfurt's stock exchange through a reverse merger with InfoGenie in 2005."
[1] https://www.ft.com/content/d080c3fc-c561-11e8-8670-c5353379f...