I can understand why an address might be necessary to coorberate that some random signer from the internet matches to an physical US address. But after I signe

I can understand why an address might be necessary to coorberate that some random signer from the internet matches to an physical US address. But after I signed, it presented a donate page. I don't want to give them money since they have my addresses. They would have been more likely to get my money if they provided an anonymous donation portal.