According to the article you posted;
- Bingo??
- Craps??
- Roulette??
- Lottery??
- Video Poker??
Almost half of the games you mentioned in your blog is luck based game, so there's no skills or techniques needed obviously.
That's right based on the games that you have mentioned so far it is most likely on luck and not a skillful based so I don't trust you. One of the games that requires skills and techniques that you have been mentioned is the video poker or the poker because in poker it requires a high skill and also a techniques in order for you to win on the said game. Just like the old times there are so many people that are required skill based game gamble in order for them to earn and to exercise their mindset.