Craigslist ad for Fashion photography exhibition

Can anyone explain this advert to me? I see them all the time all over craigslist and even applied to one last year, got accepted and then told it was a $100 hanging fee. It seems like a way to offset some of the costs of hiring an event space and also get some free decoration. Where I’m lost is – what does the photographer gain?

“Mounted works or oversize HD Plasma Screen slide-show images accepted.

Historic East Village venue space with full program provided by established grass roots arts group that includes Fashion Photo Exhibition & Women’s Wear Designer runway show. Photos will be exhibited on HD plasma screens & gallery dry mounts.”