Blood Suckers (NetEnt, certain versions) - Often cited for its high RTP and bonus-friendly nature (always check weighting). Also, you do not have to wait for long to get the payment. Focus on clearing bonuses in games where you already win consistently.
https://forum.zweb-apps.xyz/viewtopic.php?t=196301
http://1.s.2.free.fr/viewtopic.php?f=13&t=626511
http://www.horsecity.ru/phpBB3/viewtopic.php?f=7&t=255223
http://www.lada-xray.net/showthread.php?p=241397#post241397
http://mirosovak.edoras.cz/viewtopic.php?f=3&t=97511
https://catrachosporelmundo.com/index.php?topic=64972.new#new
https://boards.streamweaver.app/showthread.php?tid=669
https://boards.streamweaver.app/showthread.php?tid=40662
http://60.250.226.63/ipkb/viewtopic.php?f=41&t=1989537
https://my-mobile.eu/viewtopic.php?t=33661
http://1.s.2.free.fr/viewtopic.php?f=17&t=298036