Participating in many promotions could be our chance to be the winner. That is what people did and although they can not win before, they know they still have chance to win.
The person who participates in 10 promotions has a higher chance of being a winner than the person who only participates in 3 promotions. And this is what I do and I have been lucky a few times.
But even when I count myself as lucky, I have one in without reading the terms and conditions and ended up not being able to use that bonus because the conditions were too a bit stringent for me to understand it. I think that was wagering requirement. I hate it and it is better I deposit my own money and play that to be selected and the conditions is a wagering requirements.