Twitter on Thursday made another acquisition to build the social network’s ad tech business — specifically in the area of native ads. It has acquired Namo Media, a specialist in “native ad” content that integrates with the site where the ads are being viewed, with a focus on mobile ads. Twitter is not commenting on the price, but I have heard from reliable sources that it is around $50 million. Namo Media is closing down its standalone operation and integrating into the MoPub platform that Twitter acquired last year, the startup wrote in a blog post announcing the news. There are around eight people working for the startup now and from what I understand most will be joining Twitter. The idea of seamless ads fits in with how Twitter has been trying to ramp up its own advertising business both on desktop and mobile versions — eschewing banners and ads in the margins in favour of tweets, and more recently cards.