Twitter’s post-IPO path to prosperity presses on: the company has opened up its self-serve advertising platform to companies outside the U.S. Small-to-medium-sized businesses in the UK, Ireland and Canada get first (well, second) shot at the platform, and others will presumably follow. The move lets those without a deep working relationship with Twitter to pay to promote their accounts and tweets in a targeted fashion – so expect a lot more of those in your timeline soon, if you’re in one of the aforementioned countries.

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