Self-interest is clearly a factor in his actions, but anyone who instills a sense of community commitment and betterment in their followers is a better influence on children than those who use racism, misogyny and bigotry to advance their careers. In a world full of fallen heroes, where where we see villains succeed every day, having a younger generation see a powerful man turn his popularity towards good work is something that should be celebrated and encouraged.
Perhaps, with enough positive influence and wisdom, he'll begin moving from doing charity stunts to addressing the systemic flaws that have led to the suffering he seeks to alleviate, but I believe he should be applauded for what he's done thus far, regardless of how much self-interest is intertwined with his charity. He shows the potential to become a leader for real positive change in the upcoming generation if he continues on his current trajectory.