> He said: "Out of the 71, I would say ten or 11 are netting a minimum of half-a-million dollars a year, doing $8 million to $15 or in some cases, $20+ million revenue. I would say about 30% of my companies have returned all of my investment and then some."

Source: http://www.inc.com/chris-matyszczyk/this-is-how-many-of-mark...

Also in the same story

> "Of the 71 startups that I've invested in through Shark Tank, two have gone out of business, three are so stupid they don't know they're out of business."

I assume that, even if the deals are not particularly profitable, being paid to be a judge on a show like Shark Tank is profitable in itself.

I'm sure being seen as a judge on Shark Tank is profitable too. I can't imagine he hasn't received deal offers because of his involvement in the show.

The majority are probably worthless, but there's a non-zero chance he gets a buy-in on a new venture whose founder isn't savvy to chase normal money but did contact "that famous guy from Shark Tank."