The quality of the Summer of Arcade, on the other hand, is dropping overall, according to the average price and Metacritic score. In 2008, the first year the promotion existed, the games had an average Metacritic score of 84.8, with an average price of 960 points. This past year, however, the Metacritic score dropped to 78.8 (which still isn't too bad), but the average price was at 1120. This is purely mathematical, remember: The games are probably more complex these days, which allows Microsoft to set a higher price, and reviews on any site are subjective.
Finally, XBLA Fans found 73% of titles on XBLA have gone on sale within their first year, though many of the games on XBLA were only on sale for a day or so. That means that patient XBLA buyers can save a lot of money, if they pay attention and move quickly. There are a few other interesting conclusions in the analysis as a whole, and lots of insight on how Microsoft's Arcade has developed over the past few years.