It had been widely reported Google would be acquiring Twitch, a game streaming site, so people were surprised when Amazon announced it would buy the company on Monday. That announcement clearly meant Google refrained from purchasing Twitch for some reason, and we are beginning to find out why Google changed its mind.
Forbes is reporting Google backed out of the acquisition because of antitrust laws. Unlike Amazon which doesn't have any clear competitor to Twitch, Google owns YouTube, a video and live streaming service. With potential antitrust roadblocks in mind, Google knew there would be a fair chance that regulators would block the acquisition.
Knowing that the acquisition might fail, it would have been important for Google and Twitch to come up with a break-up agreement. Forbes reports that they were never able to do that, which contributed to the deal falling through.