Uhmm no. I will not buy a lottery ticket online with the use of bitcoin. It's because the kickback of many lottery holders are too much. If you are aware of what's happening, you can see that there is a lottery that was posted in here in which if all the possible numbers to win are filled out, they can get 5 btc. And guess what, the winner gets 1 btc.
There's always different opinions about how the business will be running, the important factor is how things will be executed and how fair this site will be, there's gamblers out there who's desperate to win big from this kind of gambling they just needed assurance from the owner.