I follow him on Twitter....actually, funny enough he was calling bull sweepers on TWTR a little more than a week ago. Just follows big money options moves.
He's parsing options chains and time & sales. He's got one heck of a scanner or is quicker on the chains than I.
As for spending money with them, I take the same view as any other stock calls for pay service...if you have the time and interest, you're better off to lose a bit in the market to figure out what they're looking for and how they're trading it than dogmatic following. If you don't have the time and interest, just buy the SPY.
funny enuf, these guys call out 500 trades a day, and you remember the 2 winners.