Yes, undoubtedly the bonus is predetermined. That’s the problem with having too much gimmickry on a slot, sooner or later you (as a provider), hit a point where you can try all you like but you will never be able to pass it off as random to the more astute, amongst the public.
It’s so obvious that these games are not random but still you have people, insisting that they are. Take that latest Millionaire game they brought out.
The basis of the game (and I may be a little off the mark because I am only going from memory but you’ll get the gist), is getting 5 connecting symbols creates a reaction and another 5 creates another, etc.
If these games (applies to all similar grid games), were truly random, with all the possible variables there would be hits available that would be akin to winning the jackpot in the Euro millions. Yet despite millions of people playing millions of spins through these games we have never seen anything that comes close to blowing you away.
It should be more than possible, with stacked symbols, retriggers, unlimited multipliers and so on but it isn’t. That tells you, it’s controlled.
The same with any pick me feature. Again what you will get is predetermined, not random luck. I have tried a system that proves these are not random and you can try it yourself.
The best example (that I can think of), is Heist at Peacock Manor (Thunderkick). On triggering the (basic 3 scatter) feature you then get 3 picks from the face down cards 10 or 12 cards, can’t remember). Obviously, you want the gold card. It’s not always available but I would say, it is 90% of the time.
My strategy is to always pick the same 3 positions/cards. Yet despite having over 100 bonuses, I have never hit the gold card. The purists would say that’s just bad luck (some sort of bad luck, that it’s never been in any of those 3 positions every time) but it isn’t. It’s the fact that the outcome of your selections is already known and it’s no more than gimmickry to make you believe the reason you got a crap bonus was because you picked the wrong cards.