-
Poker is arguably a game of skill though, if played against other humans. Sports/slots betting is another matter, unless you're finding the loopholes in the various odds being offered and hedging so you always come out ahead. I know someone who does a lot of that kind of betting, and makes enough to live off (she's a coder, and I think finds the intellectual challenge as entertaining as the money), but as noted upthread it's a lot of work.
I did think it was an interesting detail in the news reports about William Hill's online profits being up (30-odd %?) through betting on South American domestic leagues and other sports that were still open; that would suggest to me that the people betting aren't spicing up their normal sports fandom with a little flutter, but compulsive gamblers betting on anything they could find, albeit possibly with some plausible deniability.
Tell that to my former investor Ed Moncada. Think he made about $3m from poker before he diversified.