Just wanted to offer some feedback that you may want to address this issue more clearly. Being frank, I would not feel comfortable gambling the (insanely unlikely) $500+ million jackpot with a relatively faceless entity, especially without confronting this issue of trust directly. Although the terms page is quite readable and free of legalese, the idea of allowing someone to purchase such a high-value item on my behalf makes me skittish.
Good luck, though.
I swear I'm not paranoid, but we're talking about potentially millions of dollars. You only have to have one of your customers win once and then disappear with the money. If the ticket is safely on my person or in my wallet or in my safe deposit box or in a safe in my home or somewhere where I have direct access to it, then I can say with certainty that it's my ticket and not anyone else's -- and I don't have to trust anyone else with it.
I certainly trust myself more than a couple of guys with an iOS app, yes?
Edit: I'm not saying you're wrong. I'm just asking what I consider to be legitimate questions -- questions that you are not answering on your live site and questions whose answers are (and should be) more complicated than "trust us."
Just because I have a picture of a lottery ticket doesn't mean it's my ticket, and it's not gonna be good enough to take in and claim the reward myself. I still have to trust you to do that for me.
And quite frankly, I don't. I don't know you, and I have zero reason to believe that you would follow through on your promise, especially when there are potentially hundreds of millions of dollars at stake. You're gonna have to come up with a better answer to my question than "trust us."