The horse you start out with in Red Dead Redemption 2 Online is a total scrub, and earning enough money to buy a proper one is looking to be a real chore with the current in-game economy and its feeble payouts. Luckily, Rockstar is handing out some goodies at no cost during its early access period that'll help ease the initial pain of being a penniless cowpoke.
The items on offer are the Grizzlies Outlaw outfit, a High Roller Double-Action Revolver, an Alligator Skin Ranch Cutter Saddle, and a Red Chestnut Arabian Horse. Like everything else with this game, it's a bit of a process to actually claim the damn things, but free is free. [Edit: As a couple users have pointed out below, this offer is currently only available on PS4.]
The outfit can be picked up at any general store or by opening your catalog with the left D-pad, but the revolver can only be had by visiting a fence. That stuff is all fine and dandy, but the real winners are the horse and saddle which can be found at stables. Unlike the hag you receive in the introduction, who has the stamina of a drunk Homer Simpson, this stud can go the distance.