They've made it clear that they're in the business of being a media company, not a technology company. So I would say that the media-focussed products like Tumb

They've made it clear that they're in the business of being a media company, not a technology company. So I would say that the media-focussed products like Tumblr are probably more reliable bets, but it also means that they're more likely to pivot based on unpredictable trends, rather than focus on any specific technological capability.