Adobe has closed down its two app stores AIR Marketplace and InMarket, with apparently little explanation other than that it acted in response to developer feedback.

Developers who have published applications to the Intel AppUp centre, should receive an email from Intel in the next few days with important information on how you can continue to publish, track and sell your applications through the Intel AppUp center.

This should let you manage and view analytics for applications distributed through Intel AppUp. Developers will continue to be paid directly by Intel for any applications sold through the AppUp center.

The recent Flash Builder 4.5 and Flash Professional CS5.5 provide support for publishing to multiple mobile platforms including Android and Apple iOS devices.

Adobe has struggled to attract developers since Apple CEO Steve Jobs announced last year that Adobe’s Flash would not be supported on iPhones and iPads, and contributed to ongoing bad feeling between the companies.

“After reviewing our efforts and based on feedback from developers, we have decided that we will deliver the most value by helping developers author and publish their apps on multiple platforms,” said Adobe.

“When we established Adobe AIR Marketplace three years ago, there were few distribution opportunities for AIR developers,” it added.  “There are now several app stores on desktops, mobile devices and tablets that service AIR developers including Apple App Store, Android Market, BlackBerry App World, Intel AppUp center, Samsung Apps, and Toshiba App Place. We encourage you to use these newer popular app stores to distribute your applications.”

“Another win for Apple here…” wrote the Apple insider blog ‘9to5Mac’.

“That’s a refreshing tune for Adobe which isn’t the one to shy away from slamming Apple and painting the company as a closed ecosystem.”