My last play with this grandpa Zeus was months ago. I remember I managed to hit the max win 4 times in few days when I was still active playing in duelbits. Perhaps Zeus is in its "feeding mode" when you play it so you got bad result. I experienced the same as well after I hit my last max win, too many bad results so I decided to stop playing this favorite/popular game. Playing with normal/manual mode sometime give you better result than with buy bonus but in other time it can be the opposite. This is why combination of manual/normal mode and buy bonus is better than playing with bonus buy only all the time.
Well, it should be noted that one of the favorite slots is when Zeus is there, for me it is the slot that has the most option to win, it is also as you say if you can achieve a good 4x and burst in many more free spins, this game of slots has made me weigh many strategies, but the only conclusion I reach is that if I play in a linear way, that is, always bet the same money, and not much, I can achieve very large profits and above all enjoy the game a lot, For me, one of the things that I enjoy the most is the music it has and the great options there are, although one day I allocated a little money to play there, I had about 30 losses in a row, of course when I got there I only had it a balance and I didn't play anymore, but before the loss it was like a gift to myself by playing this slot.