Not sure how we got the discount, a mate of mine sorted the tickets for Eden, but we didnt buy any drinks in Linekers, went straight over to plastik. Dan may be right, you may struggle to get as lucky. Make sure if you go you don't over do it at Wonderland and save some energy for the zoo project on saturday though! (If you go to zoo there's a free bus and entry to Privilege after, although a lot of people were going to Hed Kandi)
We stayed in space till almost 5am, but we were happy to go earlier as it meant catching a bit of sun on the terrace, which is what space used to be about (but yes it was tiring and a pricey evening in terms of drinks)
Should mention we got a free bus to Tiesto from Kanya thrown in with our ticket that we bought from there.
We probably got lucky with our entry experiences, and Dan may have a point, I saw people swanning in on the internet ticket queues at few places later on in the night after queues had developed.
You are going in September, out of peak season before a lot of the closing parties so I reckon you'll be okay to get in most places, just don't buy your tickets on the door. I liked the fact we had the flexibility to change plans at the last minute, which you cant do with a already paid for ticket, and didnt have to worry about carrying my credit card around with me.