YouTube worked with a narrow range of partners when launching its subscription billing feature earlier this year (Bulletin, 10-May-13). Now it’s opening it up to a much wider range of channels on the video service: it’s “now available to eligible partners in good standing with a channel that has least 10,000 existing subscribers” in 11 countries, with Mexico the latest to be added to the latter list. The feature still works in the same way: people can charge monthly subscription fees from $0.99 for premium content on their channels, with viewers able to get a 14-day trial to see if it’s worth paying for. YouTube has also made the paid channels findable in its mobile website, with plans to add them to its mobile apps sometime soon too. There had been reports that the first batch of paid YouTube channels hadn’t performed well, but opening the feature up should spark a new wave of experimentation – including from music artists, who weren’t really part of the first wave.