How Many Times Can You Top A Plant?

[grassmania22]

I was thinking about topping my plant once again, but not sure it it would be beneficial or if it would do more harm than good. Both my plants are a bit over a foot now and I first topped them when they were about 8in tall. Is there such thing as too much topping? What are the benefits of topping more than once and what is the down side of it?

Thanks in advance.

If you top too much you will have a lot of small buds at the end

 

[808Pakalolo]

I tried to top this gal at the appropriate time but i think I cut too much and stunted it. Is there a way out of this or she's gonna just be a small bushel?
Hope she can still grow a little bigger