I'm jealous of the effect that Shark Tank has on some businesses. I've been selling cat art online for over a decade and it's a struggle to find new customers.
The I Want To Draw A Cat For You guy was on Shark Tank twice and he has a backlog of orders from customers that he's still fulfilling.
He did some very basic and remedial paintings that sold on eBay for over $300 because he's famous for being on TV. I've never gotten $300 for one painting ,even though mine are more detailed.
Being on that show is better publcity than any Twitter marketing campaign.