(Bloomberg) -- Amazon.com Inc.’s Prime Day sale can be a frustrating experience because the best deals are often gone in seconds. So this year, the company is dangling an “invite-only” promotion designed to give customers a better shot at snagging the bargains they want.Most Read from BloombergTurkey Agrees to Back Sweden’s NATO Bid in Boost to AllianceMicrosoft Cleared to Buy Activision in US as UK Pauses FightMove Over Dubai. This Tiny Emirate Wants to Be the Next Haven for BillionairesPoisone