That is part of the problem, while I am willing to pay for maps personally, not everyone is. I´ve seen this happen in back ops. Local servers ran the first map pack for 3 days then stopped because not many people around here seemed to have bought it. Now with the large number of players still playing black ops this isn´t a huge issue overall but for brink on pc with its current under 1k users this could be a glaring issue.
They would probably have to increase the number of costumes, abilities, and attachments per DLC to make up for the lack of maps in them but you wouldn´t have to worry about splitting an already low playerbase. Plus, seeing someone run around with a DLC rocket launcher or dual wielding pistols would be a much better way to advertise your DLC than simply kicking someone from the server and pissing the off when a new map rotated in.
[QUOTE=DarkangelUK;348718]How about clothing as real life purchasable clothing? Tweaked obviously for normal wear.[/QUOTE]