These changes were made to increase the frequency of nine-figure jackpots; a Powerball spokesperson believed a $500 million jackpot was feasible (it became a reality within the year,[15]) and that the 1st $1 billion jackpot in US history would occur by 2012[16] Less than three months after the Powerball changes, Mega Millions' jackpot reached $656,000,000 despite remaining a $1-per-play game.[17] The random Power Play multiplier was retired for a set, fixed dollar amount payout.[18] The $25 million rollover "cap" (creating larger 5+0 prizes) was eliminated.

The American Powerball lottery makes use of two machines drawing two sets of numbers. In this way, it is similar to other lotteries like the Mega Millions and EuroMillions. Powerball players need to match five numbers from a possible 69 (these are the white numbers), and one number from a possible 26 (these are the red bonus ‘Powerballs’). If a player matches up all six numbers that have been drawn, they will win the jackpot. Second tier division winners have a $1 million prize to look forward to – one does not even need to match all six numbers in order to become a millionaire with the US Powerball game!
The only way to be sure that what you are buying is “official” is to purchase your tickets from a company that has agents that will purchase in the real world the Powerball tickets online that you have selected. If you are a more trustworthy person and don’t need a scanned copy of your Powerball tickets online then by all means go for an online lottery ticket provider that follows the insurance model. 
The structure of the draw is one which regular lottery players will be very familiar with; players must pick 5 regular numbers from a pool with a total of 69 numbers and in addition to these regular number picks, you also choose one bonus ball (known as the Powerball) from a pool of 26. These two pools of numbers are mutually exclusive and remain completely separate throughout the drawing procedure. In order to jackpot the US Powerball, you need to match all 5 regular numbers and the Powerball. Do this and you are instant Powerball millionaire – it’s as simple as that!