I say this from experience on the game (I haven't played much but I played it because it's seen plenty of big pay-outs (see YT)) and overall being in profit. I know it's a RNG and the pay-out when you spin (before the reels land) is pre-determined but by the same token the initial layout of the bonus game generally forebodes what the result of the free spins are going to be. If the 3 jars come down close to each other then you're more rightly entitled to believe you're going to a get a good bonus round. The great thing about this slot is that when you have the bonus the anticipation is greater because you have a better idea of whether or not the free spins are going to be profitable (of course, there's still no guarantee).