We have a big old site of our company with its products A. And the two of the directories (menu sections) of site A are another additional sites - B and C. Sites B and C are devoted to one of the types of our brand's goods; they have links from site The main menu. Both of them has traffic (organic, PPC, direct), and site B has 50% direct traffic. Now we are considering putting sites B and C under site A directory like siteA.com/sitesA+B.
I would be thankful for the thoughts about the risks/reward of moving those additional sites into general site's directory siteA.com/sitesA+B. Is it a good idea or this is a risky option with a doubtful win?