Microsoft's Windows Insider program is a group of enthusiast who are trying out the upcoming release of Windows 10 for both the desktop and the phone. In the past, Microsoft has created wallpapers for those in the program and now they are giving something else away.
Tonight, the head of the program, Gabe Aul, tweeted out that they are giving away a prize to random Windows Insiders. While he did not say what the prize was, as you can see from the top comment on this post, it's a trip to Mobile World Congress.
If you open up the hub, you may see the offer to enter for a chance to win tickets to Mobile World Congress in Barcelona. Per the disclaimer, the price is worth $2498 and is being offered worldwide.
For those not familiar, Mobile World Congress is a massive tradeshow that takes place in early 2015 and is where many companies announce new products that will be released in the near future.
Source: Gabe Aul