Twitter Contests: How Big Can They Get?

Twitter is proving a viral breeding ground for marketing tactics, but the microblogging site is not a limitless, or even a very predictable, space for generating brand buzz. The distinction between a failed and successful Twitter campaign can be as simple as a prize technicality, and Twitter users' tolerance for brand spam is as yet unclear. But most worrying is the fact that right now Twitter is proving to be a fickle friend to marketers...