This marketing idea has been through many, many iterations on a theme in the time i've been reading this forum.
A lot of the time we see the
"500 x £15 is better than 1000 x £5" viewpoint...and others (my own point of view) such as
"why have 4,000 empty spaces in the ground?" (It's not like it costs extra stewarding as they are volunteers - who yes, are very hard to recruit and do a great job etc etc.)
Member get member is one of the oldest tricks in the book and pretty much every business out there does it in one form or another. (Ch*st...Vodafone even do it to me on a monthly basis...by offering me another line!!!)
The undeniable fact of the matter with this perennial idea, is that purely and simply...
nobody is prepared to physically do it. There's enough of us on this forum that claim to be "marketing savvy"...(Apart from Jenga with his £100 to print 1000 tickets! Ha ha ha
)...but evidently not savvy enough to realise that this project should not fail to increase crowds...and...based on a lot of volunteer effort and minimal costs in terms of print etc...return a positive ROI.