Don't start requireing people to give you there Social Security Number.
I have been a customer since 7/2015 playing daily fantasy sports. Tried adding money to my Yahoo Daily Fantasy account on 1/28/2017 and wasn't able too unless I gave you my SSN. Yahoo has had issues in the past with hacking and now you want players of fantasy sports to put their SSN in your hands? Questioner said you needed it to verify my identity. My account is linked to PayPal, they know who I am, the bank knows who I am and that's all that is needed. I declare all my winnings when I do my taxes so I don't need any shepherding from Yahoo to keep an eye on me. This SSN requirement is why a lot of people left FanDuel. The SSN requirement is a little too heavy handed.