Twitter is now accepting sign-ups from small businesses that want to participate in its self-serve ad program.
The self-serve rollout was reported this afternoon by Ad Age and others, and the sign-up page is now live. In a promotion with American Express, Twitter is offering a $100 credit for free advertising to the first 10,000 businesses that register — you just have to accept American Express cards, or be a cardholder yourself. Oh, and the sign-up process also requires you to follow American Express on Twitter.
Twitter has been talking about expanding its advertising program to a self-serve model for a while now. Ad Age reports that the company currently works with 3,000 advertisers, so even the first wave of self-serve customers will mark a big expansion of the program. The self-serve platform is supposed go live in late March.
A Twitter spokesperson says the company will be making a more formal announcement on Friday.