The drama started when digital buyers of Fry Cry 4 were locked out of re-downloading the title even though it was a proper digital purchase. As it turns out the inability for buyers to download it had to do with a glitch in the system, not some sort of DRM lockout that was driven by Microsoft ‘s DRM policies.
We have seen in the past on the Xbox 360 that licenses expired and titles were removed from the store, but those that purchased it prior to removal could always download it again. Nothing has changed. It would seem with the clarification from Microsoft that digital purchases continue to be safe, even if removed from the Xbox store.