As we continue to commemorate TiVo’s 20th anniversary, the DVR pioneer recently mailed hand-signed Thank You cards to its very first 2000 customers. Assuming those 480i platter-spinning trailblazers are still among the living and at the same residence to receive. Beyond a shout-out, TiVo is also spotting those folks a $100 store credit should they be in need of a hardware refresh or expansion.