While Rockstar's recent Newswire post confirmed that GTA Online isn't going the way of the Dodo on account of Red Dead Redemption 2, speculation as to what the release of the latter will change in the former is still rife. In spite of the game's current popularity, a massive release such as RDR2 is bound to cause some changes in Rockstar's policies.

We now know that DLC isn't going to cease this year, though as much was pretty much guaranteed anyway. However, chances are some price changes are in order to keep GTA Online as the top dog. While it may seem odd that the same publisher, and even developer, is treating two of their own games as rivals, when looking at the bigger picture, it all makes sense.
Sure, RDR2 is also a Rockstar title, and is going to be a major financial success, but it's pretty clear that the game won't hit the kind of popularity GTA 5 enjoys. With the latter being a constant and massive source of income showing no sign of decline, Take-Two Interactive is definitely going to want to keep it profitable.