This is from an interview with David Glanzer:
You guys have already announced that next year's Preview Night ticket packages are sold out for the time being. At this point, is it just a matter of knowing that all the tickets across the board are going to sell out eventually and the challenge is releasing them at a clip where people have the best chance at getting them while planning their summer?
I think so. That being said,
it's possible that there may be some more Preview Night passes or packages available closer to the show. The one thing we try to do is make a lot of returned passes available to people because, not only do we want people to attend the show, but also because we don't want people buying off of internet auction sites. This year, as in the past, we saw people who bought stuff that wasn't valid. Barcodes that had been sold two or three times. If ever you hear of someone selling a "VIP Ticket," you know that doesn't exist. Tell your friends there's no such thing, because you'd be surprised at how many people sell those things. We had an issue this year with hotel rooms. There would be a company that would come out claiming they had room blocks of hotels and requesting people put a deposit down. Luckily, we were able to get on top of that. But there are challenges to putting on the show. We just ask that people check out website and get the information directly from us as opposed to somebody who's trying to sell you something.
Full article here:
https://www.comicbookresources.com/?page=article&id=27562