not saying they shud not sell, most guys, and that's not many, that earn living betting sports aren't selling their bets to joe public. some can make living do one or the other or both but I doubt the guys betting the big money are selling.
Dr Bob makes living selling picks, doesn't bet (said so in WSJ article)
Billy Walters isn't sitting around sunday morning tweeting out picks for a fee
if you could see most services tax return I doubt many would show gambling income and losses as majority of income
If I could make living betting I would not be sellin, if I was sellin for living I probably would not bet.
if u go to handicappers watchdog most services are losing so the sell side covers losses ,maybe , if betting their own picks.