Kaplan, BPP, & Opentution about lectures running time

I found luckily this site and now I can the online lectures for free.
But I want to know why BPP and Kaplan are too expansive for their online lectures.
I tried to know it and surfed the net to know the difference between free & charged.
It was difficult to know it anyway. Many people say that just Opentuition is enough.
So I thought like, “Well, is there any difference for the online lectures’ running time?”
If we need to pay for something, I believe that there is also a reason for that.
Maybe, BPP or Kaplan has much longer online course programs. I guess.
What do you guys think?

Actually in my country, we need to take about 1000 hours of lectures to prepare the CA.
That’s really ‘one thousand’ hours to start the basic things.(Equivalence of F level)
I was really surprised ACCA courses on Opentuition have just several hours for each chapter. So it made me think that there should be something more.

Well, even though you are not taking expensive lectures for your own use, maybe you have friends around you who are taking Kaplan or BPP’s lectures.

So can you let me the the difference? Do they have long running time for each chapter?
I see anyway that their textbooks are thick. I need to get good grades on each exam(from F4 to F9) because I want to have an OBU degree with high marks. So I am thinking to buy some if it’s worth.