A good example is the Major Millions slot from Microgaming/Games Global. You can find these on platforms like Gamerz Arena and tournaments.
https://gravatar.com/zestful1b7b90ee3c
https://arbitrajniki.ru/forums/topic/bestaan-er-goksites-die-instant-opnames-via-skrill-of-neteller-aanbieden-casino/
http://oldsite.giessen46ers.de/fantalk/viewtopic.php?f=1&t=247672
https://debate.socialism.nl/forum/showthread.php?tid=174085
http://forum.spolokmedikovke.sk/viewtopic.php?f=18&t=1134569
https://forum.zweb-apps.xyz/viewtopic.php?t=56068
http://kiteonly12.free.fr/viewtopic.php?f=7&t=51630
https://www.ww2.site/forum/viewtopic.php?t=76352
http://mirosovak.edoras.cz/viewtopic.php?f=3&t=263276
http://kiteonly12.free.fr/viewtopic.php?f=5&t=2932