The wording might differ, but their main goal is to allow winning combinations to disappear from the screen to make room for new symbols, resulting in more wins.
http://www.suseage.com/forum.php?mod=vi ... 291&extra=
http://forum.bandingklub.cz/viewtopic.p ... &t=1405279
viewtopic.php?f=2&t=139011
https://debate.socialism.nl/forum/showt ... tid=196414
https://mmomakemoneyonline.net/threads/ ... ir.664270/
http://forum.bandingklub.cz/viewtopic.p ... &t=1193972
viewtopic.php?f=12&t=222166
https://45.83.123.20/viewtopic.php?t=7506
https://neoternia.net/viewtopic.php?p=631359#p631359
http://52she.top/forum.php?mod=viewthre ... 201&extra=
https://sozvezdie-khv.ucoz.ru/forum/8-6804-1#8368
https://www.ww2.site/forum/viewtopic.php?t=100661
http://forum.spolokmedikovke.sk/viewtop ... 3&t=935195
http://forum.spolokmedikovke.sk/viewtop ... 9&t=892121
http://oldsite.giessen46ers.de/fantalk/ ... 9&t=200863
https://45.83.123.20/viewtopic.php?t=5333
https://www.ww2.site/forum/viewtopic.php?t=66538