Plus they are now more common in online play than before.
The Victory Fist Crate drops in GTA: Online have been extended by Rockstar to October 13; originally due to end last weekend (they were part of last weekend’s Last Team Standing special event), the Crate drops would net extra cash, RP, and a limited edition Victory FistT-Shirt for players.
Today’s update, however, extends these drops all the way through October 13, meaning even if you somehow have not yet had the chance to net yourself any of these rewards, or if you simply want to hoard up on more, now you have a perfectly legitimate way to do so. Specifically, you have until the end the end of this coming weekend to do so. Rockstar has promised that these drops will now become more and more common during online play, meaning you have a higher chance of scoring them now than you did before.
GTA: Online is currently available on the Xbox 360 and PlayStation 3; it is scheduled to come to Xbox One, PlayStation 4, and PC as well, with the long awaited launch of GTA 5 on those platforms.