The provider of these cards is Paysafe Group and the company has headquarters in Vienna.
http://forum.bandingklub.cz/viewtopic.php?f=16&t=1562132
http://www.prepody.ru/topic40097.html
http://forum.spolokmedikovke.sk/viewtopic.php?f=25&t=1080508
https://mahayu.link/forum.php?mod=viewthread&tid=27916&extra=
http://oldsite.giessen46ers.de/fantalk/viewtopic.php?f=1&t=264307
http://www.prepody.ru/topic51397.html
http://www.gztongcheng.top/forum.php?mod=viewthread&tid=66517&extra=
http://users.atw.hu/tunedthings/viewtopic.php?p=330688#330688
https://forum.pcfoster.pl/topic/113947-kan-je-sneller-opnames-ontvangen-met-usdt-gratis-blackjack-spelen/
http://forum3.bandingklub.cz/viewtopic.php?f=25&t=1658291