yes they workYou can buy licenses on Carousel for like HK$20 or so, or on ebay UK for around 1 pound. I confirm they work. Each one can link up to your own real Microsoft account, not some dummy account, so onedrive etc works properly and cloud storage links correctly to your account. Works on 5 or 6 devices. The sellers claim is a lifetime license, I am not sure how they do it and if Microsoft will ever catch on and cut you off in the future, but I know people that have been using these for a few years (basically my ex colleagues that use to get it for free through the company now too stingy to pay for it and since I'm the IT guy they come running to me asking for help )