Single player games putting out "seasonal content" is kind of obnoxious too though so I wouldn't exclude them all. One example is the Moogle Chocobo Carnival and Assassin's Festival in Final Fantasy XV which players had to work very hard to patch back into the game after it was removed. The limited time Stellar Blade Summer Event wasn't nearly as impressive as the carnival, but it was still a black mark on a game that was otherwise refreshingly free from bullshit.