As I am recently interested in YFI, I found this article on Medium. Yesterday, I sent a certain amount of token but got no response back. Could you tell me why you post that subject on Medium and many people like me lost their money ?
It sounds like you fell for a scam article on Medium. While this is unfortunate, it has nothing to do with Yearn and sadly whatever tokens you sent are gone. In the future, keep in mind that the only official source for Yearn communication are the official Medium and Twitter accounts.