I've been thinking of making a suggestion along these lines for a while; now seems like the perfect time.

Ultimately, whichever way this is set up has an element of 'unfairness'. I think this is the best way, as the smaller cities find it possible to compete which is the fairest way to do things; but an obvious disadvantage is that as an individual it becomes much harder to make an impact in a bigger city where more work is required. This is arguably a good thing in terms of the fact that it requires a more cohesive effort, but it is kinda sucky for the individual who puts in potentially a lot of work with no return (other than the standard XP gain present before VIP rankings)

Therefore, can I suggest a little perk for the people who are the top VIP posters in their own city on a weekly/biweekly basis? Either a direct reward or, failing that, an achievement? 'Be a top VIP x1, x5, x10' etc in the same way as the rogue/durden achievements?

Either/or, it wouldn't compromise the actual workings of how VIP points are rewarded and seems like a natural progression to me!