I don’t use them because I mainly play online poker.There, in fact, there is no point in them, because there are no real chips.
in my opinion poker is not just about luck, it is about conviction and knowledge of your opponents if you depend only on luck you will certainly not win many games I think time is worth more than luckI don't use such. In the past i used card protector but not for luck. Now i just use chip for the same function as it is easier.