Are there any limitations on seconds?
In my opinion, I don't think so especially on strike. When I ask people about this, they usually like to say : Strikes - Stiff thumb, right thumb and left thumb are crossed
Push off - Stiff thumb, and speed

So yeah it is true that it is impossible to lift the thumb with push off methods (I think it is somewhat possible but I've never seen it so I just said it is impossible) but on strike it is possible to life the thumb. And also we all know that with little adjustments, we don't need to worry of thumbs are crossing.

I think there are really really few limitations on push off and no limitations on strike, but I also wanna know what you guys thinking of this.
And I heard that black jack mechanics prefer push off method but is it right? And if so. because of the surveillance camera? Or any other reasons?

Black jack mechanics? Where have you played blackjack where there are surveillance cameras and the cards aren’t dealt from a shoe?

Left PM!