What I am wondering is, if the buy-in feature is interesting and rewarding? You had no luck with these buy-ins, but all the videos I watch on youtube have extra ordinary luck with buy-ins

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@serjent, did you already use buy-in features on a lot of slots? What were the results?
Using buy-in features does not guarantee a win, since buy-in features cost from 80x to 150x of the wagered amount and from that, we need to hit at least the buy-in amount to break even. In my experience, using this feature does not guarantee that we will win big time since all is still a game of probability. The highest wins I got from this buy-in feature is around 500x+ the wagering amount or 5x the fund spent in buying the buy-in feature. If you have funds to spare and eager to risk for a better reward then go for the buy-in feature.