Users who recommend friends, family, or acquaintances to the Tuffer App can receive a commission for each signup made using their referral link. This rummy app newcan be a fantastic way to grow your network within the Tuffer App community and get paid extra for each new user you bring on board. The Workings of the Referral Program. Referring new users to the Tuffer App through your special referral link is a simple way to participate in the referral program.