In 2013, Jamie Siminoff pitched his smart doorbell, DoorBot, on "Shark Tank" but faced rejection. However, the product, rebranded as Ring, was later acquired by Amazon for over $1 billion. He was later invited back to "Shark Tank" as a guest judge. https://t.co/bG9oRB6NQK https://video.twimg.com/ext_tw_video/1776373539177648128/pu/vid/avc1/962x720/t_dCYNT_uHdLpfm8.mp4?tag=12