It's not completely closed yet, you can still purchase games until January 2019. But you can't add Wii points to your account anymore. So to buy games now, you would have to already have wii points on your account. These kind of services seem to stick around for a long time because companies can still make some money off game sales. I got a lot of use out of the wii shop and it feels surreal to see it go after over a decade. I still actually have some points on my account, I'd better spend them soon