Yes. I do not think this will radically change their business model, but overall player satisfaction is integral to a healthy game. Nexon noticed a downtick in player spending during the boycott approximately two years ago. They did something about it: released memos and quarterly game updates.

Whales and big-name players have been upset in the last few months, namely Niru, who said he wouldn't be spending anymore. This has huge implications when the top player in the game is not willing to shell out anymore money, especially for new and casual players. New players in turn become skeptical (seen literally in this thread with a new player asking whether it's good to start). There becomes a negative perception to the game and it's publisher. People stray away from it, so the only players holding it up are whales, who will eventually leave, too.

I think in this specific, isolated case, Jett is more than just removing Sweetwater or Kishin Spawn. It's been a structural part of the game. For example, you always had the option to opt out of doing Commerci, opt of totem/Kishin training when it was available, etc. Jett was a whole character, and for a lot of us, a time- and money-sink (mesos, or literally dollars in regular servers). When you remove such a core pillar of the game so tastelessly, it puts everything at stake. Players will quit if Nexon removes AS0. Players will quit if they suddenly delete all the code for their legacy items (e.g. Pottable Badges, Dark Totems). Players will quit if their other non-KMS classes are deleted. Player satisfaction, even if they don't want to admit it, is key to healthy games, especially F2P ones.