I hate topping. If anything it slows down growth and gives you smaller buds.
Maybe when you grow a few plants you will realize this... maybe not.
When you top the hormones of the plant change from growing up to growing out. Indoors this is very desirable and it will help with yield. Outdoors it is counter productive.
You might have a reason that you want to top, for stealth, to keep the plant short and unseen. But that does not mean it will increase yield.
When you top a growing arm that one big bud will turn into two smaller ones. How is that an increase ?
It only seems like it is because you have a higher number of buds. But the buds are not as large and do not yield as much.
And topping the same plant multiple times is just hurting the overall capability of the plant. Its NOT increasing your yield each time you top it.