After unveiling its new BlackBerry World app hub (music and video still incoming), its dev blog has now announced that RIM will be extending its Built for BlackBerry scheme. Intended to draw in even more native apps for its new mobile platform, the final cut-off date has now been moved from January 21st to February 18th. Talking to German paper, Die Welt, CEO Thorsten Heins recently backed up claims that BlackBerry's new OS would launch with 70,000 apps, although we all know that quality trumps quantity -- something that RIM aims to address. If devs submit an app that makes over $1,000 but less than $10,000, the Waterloo phonemaker will fork out the difference -- app authors can also submit their programs for approval without charge. If you're hungry for some app-based paychecks, check on the detailed criteria at our second source link.