Such a bonus is usually a deposit match or some free spins.
https://www.lvsequan.com/forum.php?mod=view...3531&extra=
http://forum.bandingklub.cz/viewtopic.php?f=25&t=1293952
https://mmomakemoneyonline.net/threads/jak-...eniadze.536932/
http://horsecity.ru/phpBB3/viewtopic.php?f=17&t=270091
http://47.88.101.141/forum.php?mod=viewthr...8194&extra=
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https://www.forum-joyingauto.com/showthread.php?tid=371692
http://forum.spolokmedikovke.sk/viewtopic....=4&t=889759
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http://www.prepody.ru/topic97771.html
http://www.horsecity.ru/phpBB3/viewtopic.p...=5&t=250017
http://horsecity.ru/phpBB3/viewtopic.php?f=33&t=136024