No, it's not a sin. Just don't call it altruism or philanthropy because it's an insult to others who are really doing it without selfish reasons or profits. Bt

No, it's not a sin. Just don't call it altruism or philanthropy because it's an insult to others who are really doing it without selfish reasons or profits. Btw he is not "earning money by helping people", he is "helping" people to earn money.