~snip~
i know, not every game is guaranteed to award free spins within a 500 spins. however, based on this trial, I don't think this experience is good enough. I feel too many disconnected symbol from the spins and look like Gates of Hades just gives more zero return to me when i trying it. I didn't try the bonus buy feature because of the disappointing impression. maybe someday i will try to use that feature for another trial if i think i'm ready to lose some money from several bonus buy if the return become bad too just like regular spins. but i wish some of slots players can give me any info about their experience while playing gates of hades.
Perhaps you can try other slot games from Pragmatic, who knows you can win after spin less than 100 spins. I see some friends can win decent amount playing kakek tua

which is very popular among our people.
Or you can try Play'N Go which also exciting and I see some of the slots have bonus buy feature. Besides that, you can check Red Tiger provider which can makes you curious.