They don't and they won't. See:
They tip him for the dopamine, they continue to be there for the dopamine, and they will actively avoid attaching thoughts of giving him money to any doubts about him. They segregate this through the common enemy. "These people fucking with DSP means he needs more support now than ever!" All kinds of rationale to build walls in their mind between the truth of his situation that continues to come out and the thing that makes them feel good. They don't actually like phil, even his legit fans belittle him. They tip for their own parasocial addiction to him and the community. If you could cut them off from it for about a month they would seek other dopamine sources, which are guaranteed to be just as bad but cheaper and probably recognize them more, and they wouldn't come back or would but not with money. They don't fixate on detractors but detractors are for sure a critical part of their post-rationalization logic.