^^ Exactly. I love digital lotteries for just that reason. Other than easy rushes where I can show up at 6:30 and still get a rush ticket, that's the only way for me to use these policies.
But I do agree that ALL digital lotteries should absolutely implement two things:
1) Require you to claim your tickets within an hour (like TodayTix does, saving your card details so you can claim with just a swipe or click) and give unclaimed tickets to other lottery participants
2) Lock winners (who claimed their tickets) out of the lottery for a month or so. (they should do that per in-person lotteries too!)
I've been in a situation before where I entered an online lottery and won, but then couldn't make it. It was one of those where you just pick up and pay at the box office so there was no way to give the ticket back. I felt bad, send them an email saying "please give this to another person who entered the lottery" but obviously got no reply.