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After seeing people commenting on these two games, I went to many casinos to look at the statistics section where the biggest winners were shown and I saw that the games Sweet Bonanza and Gates of Olympus appeared more together with the biggest winners, so I quickly concluded that people they were playing these 2 games because they heard other people saying that they won a lot when they played these 2 games, and I was thinking: "are these people forgetting that gambling depends on luck?"
It may be so, because we sometimes hear and conclude what we want to conclude without further research. If the games you mentioned have the biggest winners, chances are that this is because more gamblers play these games lately, and the evident result if that's the case is more winners (and also more losers, but who cares about losers?).