Those of you who are still playing NBA 2K18 won't be doing it for much longer online, as 2K Games will be shutting down the servers. The official date for the servers to come down will be January 18th, 2020. Meaning you have less than two weeks to do whatever you want to do with the game online before none of it is accessible. Here's the info the company posted on the shutdown.
Accordingly, any mode in NBA 2K18 that earns or uses VC will be affected, along with any other online function (such as the MyTEAM mode and online matches against other players). However, you can still play offline quick games, as well as the MyGM and MyCAREER modes offline. This will let you earn SP rather than VC.
If you created a MyCAREER or MyGM online save file before this, the server shutdown means the data will no longer be available for use and you'll have to start a new game in those modes.
It shouldn't come as a surprise to anyone who plays the NBA 2K series, as servers are periodically shut down to make way for new games to take over. This is usually the first sign that the next entry in the series is being tested for online capabilities, so get ready for all the NBA 2K21 rumors to start flying.