Four days after GTA Online launched on October 1st, and the game is still suffering from severe performance and stability problems.
As such, Rockstar was forced to disable microtransactions in GTA Online until a permanent solution is developed. The company is also maintaining a public list of current and fixed issues on its official blog.
Rockstar has never developed a multiplayer game on that scale, so launch troubles were expected. In fact a lot of blockbuster multiplayer games suffer from launch day connection and server load problems, but those are usually ironed out within a day or two.