Why nobody isn't supporting my cause?

So I have an online store. I sell shirts, hoodies, sweaters. People can personalize it or I can design something for them. So I decided to sell my product for the holidays and have a sale and raise money for St. Jude charity. I thought people would be happy I'm doing something for a cause but it's just radio silence from everyone. I just want to help people for the holidays with my business.
Why nobody isn't supporting my cause?
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