Internet radio service 8tracks has won plenty of praise from its users. Now it’s hoping to start making money without alienating them. The company will next week introduce two new elements: advertising and a premium (paid) version of its service. The ads on its site will be provided by ad networks Spin and IndieClick, with plans to experiment with sponsorships too. Meanwhile, 8tracks+ will cost $25 for six months, and is targeted at DJs and keen listeners. Initially, the carrot for paying is not having to see the ads, but DJs will soon get features including profile customisation, mix analytics and unlimited uploads.