When I see a slot promotion like that, I play, but I don't go crazy, sitting around like there's no tomorrow, I do it in a very controlled manner Slots can get you very excited, and when you see that, it means you've spent a lot of money. That's what you have to be careful about.
Slots aren't an ATM you still have to control yourself, even if you see the high RTP and a 0 house edge That's very tempting, but you still have to control yourself.
What you did was very wise, because self-control is necessary when faced with such attractive promotions. Without self-control, we are easily tempted to make impulsive decisions that can ultimately harm us, especially in slots, where luck plays a major role, you need to manage your budget properly so that you don't end up with a big loss just because of a momentary emotion.
The solution to this problem is to set a playing budget. For example you are prepared to deposit $20 for slots, regardless of whether you win or lose, as long as your desire to play is satisfied. I personally do this every time I play because it helps prevent excessive ambition.