That article as you say is more about superstitions rather than strategies,these are just things for people who are "weak" mentally in my opinion and they need something to boost their confidence.Sometime years ago when I was playing in physical casinos one guy hit the greatest jackpot at Play n Win slot and he told us he knew today he would have hit a big win because one white pigeon has entered his car for a few moments.We told him it was just plain luck that gave you the greatest jackpot yet he insisted it was not.
Personally I do not believe in any of these things except luck and that luck cannot be changed or manipulated in anyway.
The case with this person can be explained both by the law of large numbers (many are waiting for a big win and believe in omens, so for some this expectation and omen "work") and psychology (at first he won and then began to look in his head for a reason, if not for the dove, he would have remembered something else).