And also, any ideas or strategy/tricks/advices to maximize profits and minimise risks by playing this kind of gamble?
It is nearly impossible to maximize profits and minimize the risk in this kind of lottery gambling by the use of some sort of strategy. I don't think that there is some kind of strategy that will work every time since lottery game is more on luck, winning numbers will always be random and no one knows what will be the winning number.
In lottery there will be no maximize and minimize risk I think, so I agree with you, in lottery there will be a constant amount of price , you only need to buy a ticket whether it is for about 1$ or 100$ , there will be different category in there, of course the higher the price of the ticket the bigger the prize. In terms of strategies, I don't have any, since in lottery the odds are very difficult to analyze for me, the probability of each number to be pick is less than 1.