YesFest is no more.

The huge Sydney benefit gig for the Same Sex Marriage survey Yes campaign has toppled under a lack of ticket sales and issues with corporate sponsors.

The fest was set to take over the 24,000 capacity Spotless Stadium on 29 October with a stacked line-up including Client Liaison, Flight Facilities, Tkay Maidza, The Preatures and more.

In a Medium post organiser Jonno Seidler said the festival was conceived in late August, and conceded the short turnaround likely contributed to the event's cancellation.

"It was a combination of factors beyond our control; a complacency and exhaustion around the vote, a glut of other festivals in the market, a confusion around messaging and too many other people attempting to activate in the same space, issues around corporate funding and Australia’s general malaise when it comes to ticket sales," Seidler wrote.

"As it become clear that we were in real trouble over the last 72 hours, I have had recurring nightmares — which require actual sleep to have, but who’s counting — that I would end up being the guy who ran Australia’s Fyre Festival, or worse, Ben Wyatt’s Ice Town from Parks and Recreation, where one mistake haunts you for the rest of your professional life.

"Thankfully, the amazingly positive feedback I have been given, especially from artists and managers, has put that fear to rest."

All current ticketholders will be refunded.