Just random info for anyone that might find it useful, today or in the near future 
I had a Target CC with a $6k limit after about 6 month of no usage they did a CLD to $4.5k and after 1 year of no usage they closed the card. How did I find out? My credit score went up 3 points, lol. It was my oldest card but the lowest limit card. People have speculated that when you close sub-prime cards your score can go up. I know alot about Fico scoring models but this one is one I can't put my finger on as for why my score went up. Could it really be that is considered "sub-prime"? who knows....
Anywho. Just some random info for you boys and girls that will do a search for Target Visa Credit Card at one point or another. Keep activity on the card or they might close it down, specially since they no longer offer it and want to stray away from it.
I believe it's something else that caused your score to go up. I don't believe this account is in a subprime category.
Right before I first found CB, I had a target visa. I wanted to obtain a few other cards and I believe the myth that one should not have too many credit cards. So I closed the target visa in favor of "better" rewards cards. Lots wrong here. First it was one of my older cards. Got it when I was in college. Second I believed I had too many cards - yeah, even at that time still under 10 cards! Third, the target visa really wan't all that bad...the 5% discount wasn't bad.
That said, the account is still on my reports and updated monthly. I closed it in 2004. I tried to reopen with no success.