As Twitter continues its meteoric rise towards becoming the largest, easiest vehicle for mass personal communication, advertisers and marketers continue to experiment with how the social media tool can be monetized and/or integrated into their campaigns.

Three concerns in particular have driven these experiments: Cost, Impact, and Disclosure.

Cost

As anyone with a Twitter account can tell you, Twitter is a free service.  It costs you nothing to set up an account, and there is no charge for posting to Twitter.

However, there is another price associated with marketing through Twitter, and its coin is time.

If you wish to grow a successful Twitter presence …