You answered your own question. Pinip.com is a brandable which means it has limited value except to a reseller but it is of a combination that some resellers find attractive as it is CVCVC.
pinip.com might get some pinup.com traffic, I know I always hit i instead of u.
I try not to buy names on the basis of brandability if I see terms within them that could sway a company from wanting to use them. If I was naming a company, the last three letters in your name would keep me from using it.