One day, Smith decided to go through the drive-thru at his local Chick-Fil-A, where he ordered a free water -- the fast food chain offers customers free water -- and videotaped himself telling the drive-thru attendant how much he despised Chick-Fil-A.
"Chick-Fil-A is a hateful corporation," Smith said, in part, to the drive-thru attendant. "I don't know how you live with yourself and work here. I don't understand it. This is a horrible corporation with horrible values. You deserve better."
Smith then posted the video on his personal YouTube channel, but when he got back to work, he received a major shock.
"I got into work and the receptionist, the first thing, big eyes, 'Adam, what did you do?' ... she said, 'The voicemail is completely full, and it's full of bomb threats,'" Smith said in an exclusive interview with ABC News' "20/20."
Smith was fired that same day. He said at the time he was earning $200,000 annually and had over $1 million in stock options.
"It was taken when I lost my employment," he said.
"I felt like, 'Yeah, I got it. I am back,'" Smith said.
About two weeks later, Smith was fired from that job after his new boss discovered he was the guy from the Chick-Fil-A video. Smith told "20/20" in subsequent job interviews, he was very honest about the video and while prospective employers seemed empathetic and understanding in the end the companies would rescind the offers saying they didn't want the distraction.
Looking back at the video now, Smith said he was emotional.
"I don't regret the stand I took, but I regret… the way I talked to her," he told "20/20."
He even apologized to the drive-thru attendant he was angry with in another video posted to his YouTube channel, which also went viral. She has forgiven him. But Smith says even people who agreed with his pro-gay opinions won't hire him.
"I think people are scared," Smith said. "I think people are scared that it could happen again."
Kevin O'Leary, an entrepreneur and panelist on the hit ABC show "Shark Tank," said he always looks up potentially employees online before hiring them.
Smith, with his spotty digital footprint, is still looking for a job nearly three years later, and has turned to meditation. He has also just written a new memoir, "A Million Dollar Cup of Water," detailing how his public shaming led him from riches to rags and the intensive soul search for healing.
Smith said he doesn't know if his viral video will ever go away. "It feels like it just happened," he said.
ABC News' Nick Watt contributed to this report.