Their profits would only be relevant if they underpaid the staff that could fix that problem (machine-learning specialists, because you can’t imagine addressing this by hand). They don’t. Whatever lack of ressource they might have isn’t fixable with money alone.
They prioritise other issues; comments, more so, comments on comments, are nowhere near the core feature of the platform. They have, seemingly, addressed issues on copyright infringement, people gaming the recommendation system and first-level comments—things that the same creators have been loudly complaining about earlier. That sound like a reasonnable prioritisation system. The phenomena that has been described is apparently new, so the issue is presumably that they aren’t able to react to new threats rapidly. That would be a new structural concern for them, and not something that they would be expected to have fixed as a large company.
They prioritise other issues; comments, more so, comments on comments, are nowhere near the core feature of the platform. They have, seemingly, addressed issues on copyright infringement, people gaming the recommendation system and first-level comments—things that the same creators have been loudly complaining about earlier. That sound like a reasonnable prioritisation system. The phenomena that has been described is apparently new, so the issue is presumably that they aren’t able to react to new threats rapidly. That would be a new structural concern for them, and not something that they would be expected to have fixed as a large company.