So I was thiking about GTA Online, and then thought of s omething. GTA Online is already complete and that's just a bs reason for delay. They delay is an attack against used games sales. The delay is only two weeks, any longer and people would probably get impatient and not care about the online, however during that two weeks, you'll have people keeping their copies, less used copies able to be found, so more new sales. The first month is when the game is relevant, so as soon as it passes that month, they're not going to get many sales in comparison to what they gained during the first month.
So Rockstar just fixed it so they would only have half a month they have to worry about the used games market cutting into their profits. It's a smart move.