Haha that's new to me, what I do is crossing my fingers just like the usual gamblers that wants to be lucky. If that is working for you then it's good, as sometimes it also works for me when I'm crossing my fingers. Well this is just all of a sudden and there's no basis on it. We win for sometime and we lost most of the time.
Hahaha, I always saw this from many gamblers in landbased casino. And almost all of them are elders, (I'm not saying that BossMacko is ). Maybe they are old schools and still believed in superstitions that why they still do it even we already know that it doesn't work (sometimes maybe, pure coincidence). I remember one incident wherein a elderly scratch scratches the pyramid so that she can get the bonus, lo and behold the next few spins give her the bonus that she has been waiting for. Its just luck though that the reel stops at a bonus, but I highly doubt that scratching the machine makes the difference.
In my view, it is somewhat helpful for the player because it entirely depends upon the perception of a gambler and his inner vibes that how he perceives the things around him. The better you feel the best you get.
And then there's the new breed of gamblers. Never heard or doesn't believed on it and just rely on their pure God giving talents like in poker or sports betting.
Two complete school of thoughts, but just one aim, to gamble and win big.