https://www.gamespot.com/articles/gta-5-offers-free-money-this-week-new-cars-and-sal/1100-6458822/

It's "Business Week" in GTA Online, and with that comes a number of bonuses, events, and sales--as well as free money. Yes, all you have to do is log in to GTA V's multiplayer mode by the end of May 14 and you'll get a gift of $250,000 worth of in-game currency. You'll get an extra $150,000 for each day you log in, through May 14, for a potential total of $1M.

Don't fret if you don't see your cash gift show up right away, as the money will go into your account between May 15 and May 21. Additionally, Rockstar is giving away the Vanilla Unicorn t-shirt and a black Ammu-Nation hat to everyone who logs in to GTA Online by May 14.