Haven't read all the thread, but forgive me for being cunning, but I have been known to 'sneak' in upwards of 6 people into meetings in the back of my van, and use just 1 pass to get myself in... There are ways and means.
Here's the controversial bit...
I think the circuits get enough cash as it is from the 'Hirer'. As far as I know, New Era are actually doing their best to give teams extra tickets for free by adding the 'sponsors details' bit on the entry forms, so that they can 'prove' to the circuit that the tickets are going to sponsors, and not just extended family and mates. Well done New Era I say.
Always worth doing the asylum smuggling bit though