This kind of bonus usually puts some extra cash in your account upon signing up.
http://www.prepody.ru/topic88252.html https://neoternia.net/viewtopic.php?t=216645 http://forum.bandingklub.cz/viewtopic.php?f=32&t=1209115 http://forum3.bandingklub.cz/viewtopic.php?f=29&t=1420821 http://forum.bandingklub.cz/viewtopic.php?f=25&t=1286737 http://forum3.bandingklub.cz/viewtopic.php?f=50&t=1267501 http://www.horsecity.ru/phpBB3/viewtopic.php?f=33&t=194147 http://forum.arduionly.com.au/showthread.php?tid=152210 http://ewmen.com/viewtopic.php?t=571202 http://ewmen.com/viewtopic.php?p=951189#p951189 https://forum.zweb-apps.xyz/viewtopic.php?t=10018 http://www.prepody.ru/topic95749.html http://teamspeak.bg/viewtopic.php?f=11&t=70182 https://www.ww2.site/forum/viewtopic.php?t=40633 https://www.ww2.site/forum/viewtopic.php?t=66534 http://daveandspencer.com/forums/viewtopic.php?f=7&t=884928 http://forum.bandingklub.cz/viewtopic.php?f=15&t=1179195 http://nihongo.edu.lk/showthread.php?tid=325796&pid=527433#pid527433