I'm certain that most of them were always going to sell their "extra" or "friend's" ticket online for profit, just not willing to admit it online.
If you're part of a theme camp you normally buy as many tickets as youre allotted during the theme camp sale. This sale happens before the public one and the reason you buy as many as you can is because for the last 10 years getting a ticket in the public sale is a lottery. After the public sale you normally redistribute your extra tickets to people who want to camp with you.
The public sale this year was probably pretty easy to get tickets, so people might be stuck with theme camp tickets. Also, BM delayed mailing physical tickets this year to try and boost sales during their final OMG sale. BM did their best to try and screw people too.
Assuming that is somekind of illegal drug fest, could this be because drugs are not considered as bad now.
Or are law enforcement is showing up or was security is beefed up to prevent things not considered safe ?
Why are you going to Burning Man?!
Status, approval, escape, be around rich people, etc etc. More than a few people do things that don't make rational sense but perhaps they have a covert survival strategy I or no one else understands.