The odds of winning the Mega Millions jackpot are 1 in 302.6 million, making them the highest odds of any other state or multi-state lottery game ever played in the United States. However, this means the jackpot can grow to surpass the billion-dollar mark with relative ease. The overall odds of winning any prize are 1 in 24, which is slightly better than that of Powerball, which are 1 in 24.87.
State lotteries have become a significant source of revenue for states, raising $17.6 billion in profits for state budgets in the 2009 fiscal year (FY) with 11 states collecting more revenue from their state lottery than from their state corporate income tax during FY2009. Lottery policies within states can have conflicting goals. Given that instructions are passed down from state legislatures, lottery implementation is often expected to be carried out with reduced advertising and funding while still producing the same amount of revenue. This issue led states to look for loopholes in the system. Massachusetts, for example, had its advertising budget dramatically cut, and therefore started using free-play coupons as money to pay for advertising. This led to an IRS investigation into alleged non-reporting of income because the IRS considered the coupons to have monetary value.

On top of the cost of a regular ticket, you can pay extra for the Power Play option which acts as a multiplier of prizes in a similar way to how Mega Millions’ Megaplier does. Taking the Power Play option multiplies winnings earned by matching just one number right through to matching five numbers - turning the $1,000,000 prize into a $2,000,000 prize.
Once your ticket is purchased, scanned and uploaded into your account that ticket is yours. Legally and in every other sense possible. The same questions always pop up at this stage of the explanation to new time online lottery players and these doubts can be best explained in further detail in the article on the Iraqi Lottery winner but the gist of it is as follows: 
Because the quoted jackpot amount is an annuity of 30 graduated annual payments, its cash value relative to the annuity fluctuates. The actual ratio depends on projected interest rates and other factors. MUSL starts with the cash value, built from a percentage of sales, and then calculates the advertised jackpot amount from that value, based on the average costs of the three best securities bids.[30]
Despite the uneasiness of many to begin with, I know of no disputes or complaints from people who have bought Powerball tickets online via the insurance model, won and not been paid. As you can imagine, this scenario would effectively close down their website as they rely solely on the trust factor. The insurance model means that you will not be buying “official” tickets, but what do you care if you get paid your millions at the end of the day!

First introduced in 1996, the USA Mega Millions was originally known as ‘The Big Game’ - and looking at its payouts over the years, it’s no surprise as to why. With a starting jackpot of $40 million and a record jackpot of $656 million to date, winning the USA Mega Millions is no joke - although when you hit the big one you’ll be laughing all the way to the bank.
Note: As indicated in the instructions, for the purposes of eligibility some countries include components and dependent areas overseas.  If you are a native of a dependency or overseas territory, please select the appropriate country of eligibility.  For example, natives of Macau S.A.R should select Portugal, and natives of Martinique should select France.
*a tip to know whether the website you are looking at actually buys lottery tickets online or follows the insurance model is to check the wording that they use. If you see the words “Play” then you can be confident it is a company that has agents and buys your tickets physically, if you see the words “Bet” you can be sure it is following the insurance model and you are placing a bet on the outcome of a lottery.