Players can buy more virtual currency if they want, but they don’t have to.
http://ewmen.com/viewtopic.php?p=1416540#p1416540
http://47.88.101.141/forum.php?mod=viewthread&tid=167099&extra=
http://oldsite.giessen46ers.de/fantalk/viewtopic.php?f=3&t=198838
http://52she.top/forum.php?mod=viewthread&tid=194089&extra=
http://qrfonline.qrfmag.com/qrfswap/viewtopic.php?t=175645
http://forum.bandingklub.cz/viewtopic.php?f=38&t=1586948
https://forum.zweb-apps.xyz/viewtopic.php?t=43033
https://neoternia.net/viewtopic.php?t=227733
http://www.prepody.ru/topic76421.html
http://forum.spolokmedikovke.sk/viewtopic.php?f=2&t=1067302
http://biopharmamash.com/viewtopic.php?t=1444772
http://horsecity.ru/phpBB3/viewtopic.php?f=22&t=364888
https://neoternia.net/viewtopic.php?p=305437#p305437
http://forum3.bandingklub.cz/viewtopic.php?f=15&t=1248066