https://www.gamespot.com/articles/gta-5-whats-new-in-gta-online-for-ps4-xbox-one-and/1100-6458151/

Rockstar has announced all of this week's new sales, events, and double XP opportunities for GTA Online--and there's a lot. Now through April 16 as part of what Rockstar is calling "Contraband Week," you can earn double GTA$ and RP for all Gunrunning Sell missions.

Additionally, the Target Assault races will pay double GTA$ and RP through the same time. This is a new mode featuring racing and shooting that was only just released this month.