Thanks Mr.Patrick and Ms.Donna for your suggestions which are very true with respect to SEO perspective.
But, Please understand my situation.
Let say I have 10 folders below root domain. So, all folders with get 10% of root domain rank juice. In case all my profitable pages (50k) are in 1st folder, all those pages will get 10/50k juice value.
If I put those pages directly below root domain, I will get 100/50k+x juice value from the root domain. ( x=9 other folders)
That means I am going to get 10 times more juice value to all my profitable pages in second case. That's what my competitors are doing. In case I don't, I will loose that opportunity.