Beginning of this week, a number of apps on the Windows Phone 7 marketplace hit 20,000, but a number of them were considered spam apps by developers.
Todd Brix, on Windows Phone blog admitted that "In recent weeks a handful of companies have individually published hundreds of apps in a matter of a few days. We call this bulk publishing. While these apps meet our certification requirements and give consumers a wider selection of content, we're also finding that publishing them in bulk degrades our customers' experience."
Effective immediately, he says, "we're limiting the number of apps any one developer can have certified in a single day to 20." Developers creating a large number of apps can still submit all of them for certification, but they will be certified at a maximum rate of 20 per day rather than all at once. This change helps us retain a balance of choice and customer experience by enabling customers to see a broader and more representative assortment of new apps from the developer community when they see "New" apps every day.
Many developers have complained that the 'bulk submissions' have been decreasing the potential amount of views that their work might otherwise receive. With this change in submission rules, the response so far has been relatively positive.
Microsoft has also stated that they're going to companies who most recently published a large number of apps with similar functionality in a short period of time to explore how they can better take advantage of the Windows Phone platform to improve the functionality of their apps and reduce the need for large numbers of similar apps. This comes as many of the recent bulk submissions are being removed from the marketplace due to the pressure of developers and those claiming Microsoft is using the situation to boost marketplace figures.
[Source: Windows Phone blog]