Some sites also feature progressive jackpot games, where the prize grows with each bet until someone wins the entire amount.
https://boards.streamweaver.app/showthread.php?tid=9801
https://www.ww2.site/forum/viewtopic.php?t=62055
https://www.ww2.site/forum/viewtopic.php?t=381833
https://planeswalkers.org/viewtopic.php?t=108365
http://mirosovak.edoras.cz/viewtopic.php?f=3&t=555820
http://www.horsecity.ru/phpBB3/viewtopic.php?f=22&t=390997
http://horsecity.ru/phpBB3/viewtopic.php?f=10&t=424522
https://talkingpoints.org/subx/showthread.php?tid=91284
http://mirosovak.edoras.cz/viewtopic.php?f=3&t=516292
https://catrachosporelmundo.com/index.php?topic=11352.msg11793#msg11793
http://mirosovak.edoras.cz/viewtopic.php?f=3&t=507908
http://www.lada-xray.net/showthread.php?p=268533#post268533