When the pre-order for Grand Theft Auto V became available you were able to get $1,000,000 in-game credits as well as an extra $300,000 and a free copy of Grand Theft Auto: San Andreas if you pre-ordered before February 1st. However, it looks like Rockstar have extended the date for earning extra stuff, although it doesn't include an extra copy of San Andreas anymore.
Taking a look at the store page for the game earlier today, there was an announcement that states that March 9th is now the cut-off date for extra pre-order bonuses.
While the initial free bonus game offer has expired, you can still get a bonus GTA$300,000 (on top of the $1,000,000 in in-game cash for all pre-orders) if you pre-order the digital download from Steam between now and March 9th.
So those of you that were on the fence about pre-ordering before February and ultimately missing out on the extra offer, have got the chance to think about it for an extra month by the looks of things.