Twitter Bans 3rd-Party Ads

Twitter has is banning third-party advertisements on its site, in a move to control its monetization of the micro-blogging service, and perhaps also to protect users from perceived ad spamming.

The Twitter "Promoted Tweets" platform poses some risks of user annoyance, but might arguably provoke much more irritation if the appropriateness of the promoted messages is not controlled.

As mobile advertising starts to become a more important and bigger revenue stream, control of inventory is going to become a bigger issue, as it always does for ad-supported media.

Twitter Gets Serious About Getting Paid - PCWorld