Crypto founder mocks American Express’ controversial fee hike [https://www.thestreet.com/.image/t_share/MjE3ODY1NjkwNDQ5NzE3MDg0/gettyimages-521773562.jpg] Crypto founder mocks American Express’ controversial fee hike Gemini co-founder Cameron Winklevoss drew attention with a tongue-in-cheek post about Gemini’s credit card fees, contrasting American Express’ $200 hike. [https://www.thestreet.com/crypto/markets/crypto-founder-mocks-american-express-controversial-fee-hike]