There is controversy over empty seats at sold out events at the Olympics. People who could not get tickets are annoyed to see them.
The way that tickets were sold is odd. I know people who applied for tickets in ony the events they were interested in and were allocated no tickets. I know other people who applied for lots of events and got tickets they were not interested in. It would not surprise me if some of those empty seats belong to people who decided against going to events they had tickets for because they were not interested enough. The tickets were sold this way to stop the prices getting so high that poor people could not afford them. The tickets can not be transferred for the same reason.
The trouble is that you either have a market or you have a lottery. There are no other choices, no matter how you try to dress it up. The trouble with lotteries is they do not allocate resources efficiently.