A look at Xbox Live’s front page over the past few weeks included a big, fat advertisement for Mark of the Ninja, quite possibly this year’s best release for the platform. When Mark of the Ninja was released on Friday, September 7, however, there wasn’t one. Okay, that’s not completely true--it was on the games tab.This is what Xbox Live looked like the day after Mark of the Ninja launched on the service.But who actually navigates to the games tab to learn about new content on Xbox Live? I don’t. Do you? We head to the games tab to purchase something we’ve already been convinced on.Microsoft should be applauded for crafting an interface that, while rightfully scrutinized in recent revisions, can prove useful to the user and creator, and help expose them to one another. That’s not as easy to do on Wii or PlayStation 3, and having to open a store will always mean some never see it. It's an important distinction.It’s frustrating, then, to turn on Xbox Live and see nothing but advertisements for movies and politics. (Though, good on Microsoft should for attempting to inform a demographic of the electorate that is historically finicky when it comes to voting.)Ads promoting Mark of the Ninja, a Microsoft-published release, were nowhere to be found on Friday, September 7. It was Microsoft’s decision to publish Mark of the Ninja on that day. It was, then, up to Microsoft to give up one of its likely lucrative advertisements slots for it. And that’s where I'm guessing the rub is. Promoting Mark of the Ninja might end up with more sales for Mark of the Ninja, and thus more profit for Microsoft, but it’s not a guarantee. If no one clicks on the advertisement to download Snow White and the Huntsmen, Microsoft still pockets the ad money.Yeah, Microsoft eventually gave Mark of the Ninja prominent placement on the dashboard, but like other media, games typically do their best business on the first day of release. It’s where you build momentum forward. Mark of the Ninja was released on a Friday, and that’s when reviews and social networks were buzzing about the game.“Better late than never,” said Supergiant Games creative director Greg Kasavin to me Twitter.Kasavin was responding to a photo (pictured above) where I showed relief that Mark of the Ninja was now promoted. Another user asked whether or not days later was a big deal, which Kasavin was quick to discuss.“Late isn't a stretch,” he said. “Many games do their best business on the first day of release and then it's all downhill.”If someone had seen an advertisement for Mark of the Ninja when booting up their Xbox 360 that night, maybe it would have helped pushed them over the edge. When a title's within the games tab (or, worse, buried in the games library), the chances of just finding something become more and more remote. These games deserve better.Friday has become a new, unexpected slot for XBLA releases. Mark of the Ninja joins Fez, Joe Danger: The Movie, and others. In the TV world, having a show on Friday night is a death sentence, as many consumers are out enjoying the weekend. Discoverability is huge problem on XBL, and prominent ads are one way, albeit not a great one, to combat that. If a user boots their Xbox 360 once that weekend, possibly for a round of Call of Duty, that ad is vital.Microsoft is under no obligation to make the front of Xbox Live wholly dedicated to video games, and I’m not expecting or asking them to. That said, video games are the reason Microsoft’s box is in a position to compete as an all-in-one media solution, the holy grail when it comes to today’s television, and the games aren't getting their due.I asked Microsoft to provide some clarification on how its advertisements for self-published games are determined, and got this statement in response:“We do not share the editorial details of how we determine promotional merchandising placement on the Xbox LIVE dashboard, which is separate from the paid advertising that appears on the service.”...which is exactly the answer I expected, and I don't blame Microsoft for not saying anymore. Ads are determined on a game-by-game basis, and are often part part of contrats between Microsoft, both as a platform holder and a publisher. Getting ad placement can, for example, change the royalty share on a game. That's not true of every game, but it happens, and shows the kind of power Microsoft wields when it comes to discoverability on its service.This isn’t the first time it's happened, and it probably won’t be the last (see: Joe Danger). I’m not sure why this particular situation incensed me so much. Maybe it's because I’ve heard similar stories of developers upset at the disconnect between the internal teams at Microsoft who handle game development and game promotion. Maybe it’s because Mark of the Ninja is just a damn good game, and it’d be an awful shame if more people didn’t play it.More than anything, though, XBL has the power to expose great games to more people. It's a tool of money and power, and it has the ability to do more than I ever could. Can you fault me for wanting Microsoft to use it well?