Only correcting your maths. Everything else, I understand.
Although looking at it from a business perspective (yes, I know, how DARE they) take away the corporate sponsors, and you are actually talking about 100 or so fans, rather than 'the fans'. Much as we'd love them to, they are not going...
That's only half of the maths though, Unc
£7,000 additional revenue (IF he's right) but also the saving of the full cost (and effort) of putting on the dedicated sponsors' dinner.