I can't see the public wanting to have to wait until certain deadlines to get tickets, only to find they didn't 'win' and need to wait until the next deadline to pay more and see if maybe they get tickets the next go=round. I suspect most people want to buy a ticket and be done.

"I'd love to be a bridesmaid at your wedding. I'll let you know next Friday whether I can get tickets at a price I'm willing to pay. If not, I might have another shot 14 days later. I'll let you know then so you can finish your planning..."