There are a few reasons why it is important to not let it die.
First of all, you had a lot of people renting mining rig, spending money in ICO, buying coins etc. But this is not the main reason.
ICB is listed on cryptsy and bittrex. This is a good start. Second reason is ICB still have a nice community, and community takeovers are not always bad look at Pinkcoin and Vootcoin, both are doing very well.
If you didn't invest any money in ICB, then it is easy to say, let it please go away, but there are others that really spend a few BTCs on it. I also spend some money on it, not a lot, but still.