[jhcl]

You'd have to be lucky though. Unless you are/were an angel (volunteer) you'll have to depend on the ticket lottery. The switch to Hamburg wasn't enough to accommodate the number of participants nor did the switch to Leipzig. It really is a very popular event.

[glogla]

They are slowly scaling the event up. Hamburg were 15k people. Last year was 18k. But they are careful to scale it slowly so that things dont collapse.

[Aweorih]

There where 3 dates for buying a ticket. For me it was no problem as the webpage for buying did not have the usual problems like being down when sale started. You have to be there in time though