Good article here on the biggest losers in the world Gambling: The biggest losers | The Economist
From what I hear the bigger markets outside of N.America would be, UK, France, Germany, Italy, Turkey, Greece and Scandinavia….I also like Australia, went there a few years ago and couldn’t believe how much people gambled and what a major part of life it was. Of course there is Asia which is huge but a much harder one to crack…..another interesting opportunity fast approaching is the mobile gambling market which is expanding very very fast, or maybe go for a niche like live dealer casinos.
Re bingo, still a big market especially with the side games, only thing is there some v big affiliates in that space well at least in the UK….but with some of the longer tail keywords or a particular focus on the “community” side you may do well