SE doesn't have the problem of deleted characters that we do. The server keeps records of which characters belong to whom, so they can still track the spammers even if they were to delete every character on the account.

The problem isn't deleted characters anyway. The problem is the pay-per-hour system in place for China. Unlike western players who have to purchase the game and then pay a monthly subscription, they only pay for the time spent in game. It's nothing to them if a character or account is banned because they can easily get a new one at relatively low cost. They basically pay the equivalent of 10 cents an hour.

Mind you, while that might sound cheap to us that's just because of the dollar exchange rate versus the Yuan. It's actually one of the more expensive subscriptions in China due to their lower income.